<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.24.0.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>88</ContextCount>
  <ElementCount>76</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>50</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>3</UnitCount>
  <MyReports>
    <Report instance="c497.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>01001 - Document - Document and Entity Information {Elements}</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dimensional.com/20231031/role/DocumentAndEntityInformation1</Role>
      <ShortName>Document and Entity Information</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="c497.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>01002 - Document - Risk/Return Summary (GLOBAL EQUITY PORTFOLIO) {Unlabeled}</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dimensional.com/20231031/role/RRSummary2</Role>
      <ShortName>Risk/Return Summary (GLOBAL EQUITY PORTFOLIO)</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="c497.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>01003 - Disclosure - Risk/Return Detail Data (GLOBAL EQUITY PORTFOLIO) {Elements}</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dimensional.com/20231031/role/RRDetailData3</Role>
      <ShortName>Risk/Return Detail Data (GLOBAL EQUITY PORTFOLIO)</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="c497.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>01010 - Document - Risk/Return Summary (GLOBAL ALLOCATION 60/40 PORTFOLIO) {Unlabeled}</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dimensional.com/20231031/role/RRSummary10</Role>
      <ShortName>Risk/Return Summary (GLOBAL ALLOCATION 60/40 PORTFOLIO)</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="c497.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>01011 - Disclosure - Risk/Return Detail Data (GLOBAL ALLOCATION 60/40 PORTFOLIO) {Elements}</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dimensional.com/20231031/role/RRDetailData11</Role>
      <ShortName>Risk/Return Detail Data (GLOBAL ALLOCATION 60/40 PORTFOLIO)</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="c497.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>01018 - Document - Risk/Return Summary (GLOBAL ALLOCATION 25/75 PORTFOLIO) {Unlabeled}</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dimensional.com/20231031/role/RRSummary18</Role>
      <ShortName>Risk/Return Summary (GLOBAL ALLOCATION 25/75 PORTFOLIO)</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="c497.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>01019 - Disclosure - Risk/Return Detail Data (GLOBAL ALLOCATION 25/75 PORTFOLIO) {Elements}</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dimensional.com/20231031/role/RRDetailData19</Role>
      <ShortName>Risk/Return Detail Data (GLOBAL ALLOCATION 25/75 PORTFOLIO)</ShortName>
      <MenuCategory>Risk/Return</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>
  <InputFiles>
    <File>c497-20240229.xsd</File>
    <File>c497-20240229_cal.xml</File>
    <File>c497-20240229_def.xml</File>
    <File>c497-20240229_lab.xml</File>
    <File>c497-20240229_pre.xml</File>
    <File doctype="497" isN1a="true" isRR="true" isRRorOEF="true" original="c497.htm">c497.htm</File>
  </InputFiles>
  <SupplementalFiles>
    <File>img_19a1dddd4d394f1.jpg</File>
    <File>img_38a79b9859814f1.jpg</File>
    <File>img_3eb9d87b92d84f1.jpg</File>
    <File>img_67197fdcf36a4f1.jpg</File>
    <File>img_8c0e028025374f1.jpg</File>
    <File>img_b2825df768c84f1.jpg</File>
    <File>BarChart1.png</File>
    <File>BarChart2.png</File>
    <File>BarChart3.png</File>
  </SupplementalFiles>
  <BaseTaxonomies>
    <BaseTaxonomy items="8">http://xbrl.sec.gov/dei/2023</BaseTaxonomy>
    <BaseTaxonomy items="324">http://xbrl.sec.gov/rr/2023</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
