<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.20.2</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>3</ContextCount>
  <ElementCount>129</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>2</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>2</UnitCount>
  <MyReports>
    <Report instance="world-20200922.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></MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="world-20200922.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>000011 - Document - Risk/Return Summary {Unlabeled} - ESG US Corporate Bond ETF</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.vanguard.com/role/DocumentRiskReturnSummaryUnlabeledESGUSCorporateBondETF</Role>
      <ShortName>Risk/Return Summary- ESG US Corporate Bond ETF</ShortName>
      <MenuCategory></MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="world-20200922.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>000012 - Schedule - Shareholder Fees</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.vanguard.com/role/ScheduleShareholderFees000012</Role>
      <ShortName>Shareholder Fees</ShortName>
      <MenuCategory></MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="world-20200922.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>000013 - Schedule - Annual Fund Operating Expenses</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.vanguard.com/role/ScheduleAnnualFundOperatingExpenses000013</Role>
      <ShortName>Annual Fund Operating Expenses</ShortName>
      <MenuCategory></MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="world-20200922.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>000014 - Schedule - Expense Example {Transposed}</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.vanguard.com/role/ScheduleExpenseExampleTransposed000014</Role>
      <ShortName>Expense Example</ShortName>
      <MenuCategory></MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="world-20200922.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>000019 - Disclosure - Risk/Return Detail Data {Elements} - ESG US Corporate Bond ETF</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.vanguard.com/role/DisclosureRiskReturnDetailDataElementsESGUSCorporateBondETF</Role>
      <ShortName>Risk/Return Detail Data- ESG US Corporate Bond ETF</ShortName>
      <MenuCategory></MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="world-20200922.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.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></MenuCategory>
      <Position>7</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <Logs>
    <Log type="Warning">[ix-0514-Hidden-Fact-Eligible-For-Transform] WARN: 20 fact(s) appearing in ix:hidden were eligible for transformation: rr:ExpenseExampleClosingTextBlock, rr:ExpenseExampleHeading, rr:ExpenseExampleNarrativeTextBlock, rr:ExpenseHeading, rr:ExpenseNarrativeTextBlock, rr:ObjectiveHeading, rr:ObjectivePrimaryTextBlock, rr:OperatingExpensesCaption, rr:PerformanceNarrativeTextBlock, rr:PortfolioTurnoverHeading, rr:PortfolioTurnoverTextBlock, rr:ProspectusDate, rr:RiskHeading, rr:RiskNarrativeTextBlock, rr:ShareholderFeesCaption, rr:StrategyHeading, rr:StrategyNarrativeTextBlock, world:TransactionFeeOnConversionToETFShares, world:TransactionFeeOnPurchasesandSales, world:TransactionFeeOnReinvestedDividends</Log>
  </Logs>
  <InputFiles>
    <File doctype="485BPOS" original="world-20200922.htm">world-20200922.htm</File>
    <File>world-20200922.xsd</File>
    <File>world-20200922_cal.xml</File>
    <File>world-20200922_def.xml</File>
    <File>world-20200922_lab.xml</File>
    <File>world-20200922_pre.xml</File>
  </InputFiles>
  <SupplementalFiles>
    <File>flag.gif</File>
    <File>vanguard.gif</File>
  </SupplementalFiles>
  <BaseTaxonomies>
    <BaseTaxonomy>http://xbrl.sec.gov/dei/2020-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://xbrl.sec.gov/rr/2018-01-31</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
