<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.24.1.1.u2</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>111</ContextCount>
  <ElementCount>75</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>47</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>2</UnitCount>
  <MyReports>
    <Report instance="f38801d0.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>000000 - Document - Document and Entity Information {Elements}</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.vanguard.com/role/DocumentDocumentandEntityInformationElements</Role>
      <ShortName>Document and Entity Information</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="f38801d0.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>000019 - Disclosure - Risk/Return Detail Data {Elements} - Vanguard Dividend Appreciation Index Fund (Admiral)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.vanguard.com/role/DisclosureRiskReturnDetailDataElementsVanguardDividendAppreciationIndexFundAdmiral</Role>
      <ShortName>Risk/Return Detail Data- Vanguard Dividend Appreciation Index Fund (Admiral)</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="f38801d0.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>000029 - Disclosure - Risk/Return Detail Data {Elements} - Vanguard Dividend Appreciation Index Fund (ETF)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.vanguard.com/role/DisclosureRiskReturnDetailDataElementsVanguardDividendAppreciationIndexFundETF</Role>
      <ShortName>Risk/Return Detail Data- Vanguard Dividend Appreciation Index Fund (ETF)</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="f38801d0.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>000039 - Disclosure - Risk/Return Detail Data {Elements} - Vanguard Dividend Growth Fund (Investor)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.vanguard.com/role/DisclosureRiskReturnDetailDataElementsVanguardDividendGrowthFundInvestor</Role>
      <ShortName>Risk/Return Detail Data- Vanguard Dividend Growth Fund (Investor)</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="f38801d0.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>000049 - Disclosure - Risk/Return Detail Data {Elements} - Vanguard Energy Fund (Retail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.vanguard.com/role/DisclosureRiskReturnDetailDataElementsVanguardEnergyFundRetail</Role>
      <ShortName>Risk/Return Detail Data- Vanguard Energy Fund (Retail)</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="f38801d0.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>000059 - Disclosure - Risk/Return Detail Data {Elements} - Vanguard Global Capital Cycles Fund (Retail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.vanguard.com/role/DisclosureRiskReturnDetailDataElementsVanguardGlobalCapitalCyclesFundRetail</Role>
      <ShortName>Risk/Return Detail Data- Vanguard Global Capital Cycles Fund (Retail)</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="f38801d0.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>000069 - Disclosure - Risk/Return Detail Data {Elements} - Vanguard Global ESG Select Stock Fund (Retail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.vanguard.com/role/DisclosureRiskReturnDetailDataElementsVanguardGlobalESGSelectStockFundRetail</Role>
      <ShortName>Risk/Return Detail Data- Vanguard Global ESG Select Stock Fund (Retail)</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="f38801d0.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>000079 - Disclosure - Risk/Return Detail Data {Elements} - Vanguard Health Care Fund (Retail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.vanguard.com/role/DisclosureRiskReturnDetailDataElementsVanguardHealthCareFundRetail</Role>
      <ShortName>Risk/Return Detail Data- Vanguard Health Care Fund (Retail)</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="f38801d0.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>000089 - Disclosure - Risk/Return Detail Data {Elements} - Vanguard Real Estate Index Fund (Investor)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.vanguard.com/role/DisclosureRiskReturnDetailDataElementsVanguardRealEstateIndexFundInvestor</Role>
      <ShortName>Risk/Return Detail Data- Vanguard Real Estate Index Fund (Investor)</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="f38801d0.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>000099 - Disclosure - Risk/Return Detail Data {Elements} - Vanguard Real Estate Index Fund (Admiral)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.vanguard.com/role/DisclosureRiskReturnDetailDataElementsVanguardRealEstateIndexFundAdmiral</Role>
      <ShortName>Risk/Return Detail Data- Vanguard Real Estate Index Fund (Admiral)</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="f38801d0.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>000109 - Disclosure - Risk/Return Detail Data {Elements} - Vanguard Real Estate Index Fund (Institutional)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.vanguard.com/role/DisclosureRiskReturnDetailDataElementsVanguardRealEstateIndexFundInstitutional</Role>
      <ShortName>Risk/Return Detail Data- Vanguard Real Estate Index Fund (Institutional)</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="f38801d0.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>000119 - Disclosure - Risk/Return Detail Data {Elements} - Vanguard Real Estate Index Fund (ETF)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.vanguard.com/role/DisclosureRiskReturnDetailDataElementsVanguardRealEstateIndexFundETF</Role>
      <ShortName>Risk/Return Detail Data- Vanguard Real Estate Index Fund (ETF)</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="f38801d0.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>040000 - Disclosure - Risk/Return Detail Data {Elements}</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/rr/role/RiskReturnDetailData</Role>
      <ShortName>Risk/Return Detail Data</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File doctype="485BPOS" isN1a="true" isRR="true" isRRorOEF="true" original="f38801d0.htm">f38801d0.htm</File>
    <File>specialized-20240523.xsd</File>
    <File>specialized-20240523_cal.xml</File>
    <File>specialized-20240523_def.xml</File>
    <File>specialized-20240523_lab.xml</File>
    <File>specialized-20240523_pre.xml</File>
  </InputFiles>
  <SupplementalFiles>
    <File>dae920_17.jpg</File>
    <File>dai602_15.jpg</File>
    <File>dg57_14.jpg</File>
    <File>e51_16.jpg</File>
    <File>flag.gif</File>
    <File>gcc53_11.jpg</File>
    <File>gesg2247_6.jpg</File>
    <File>hc52_12.jpg</File>
    <File>msci_3.jpg</File>
    <File>reetf986_17.jpg</File>
    <File>rei123_21.jpg</File>
    <File>rei3123_16.jpg</File>
    <File>rei5123_12.jpg</File>
    <File>vanguard_2.jpg</File>
  </SupplementalFiles>
  <BaseTaxonomies>
    <BaseTaxonomy items="8">http://xbrl.sec.gov/dei/2023</BaseTaxonomy>
    <BaseTaxonomy items="834">http://xbrl.sec.gov/rr/2023</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
