<?xml version="1.0" encoding="utf-8"?>
<FilingSummary xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <Version>2.4.0.6</Version>
  <ProcessingTime />
  <ReportFormat>Html</ReportFormat>
  <ContextCount>70</ContextCount>
  <ElementCount>95</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>43</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>2</UnitCount>
  <MyReports>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>010000 - Document - Risk/Return Summary {Unlabeled}</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/rr/role/RiskReturn</Role>
      <ShortName>Risk/Return Summary</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>020010 - Schedule - Shareholder Fees</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/rr/role/ShareholderFeesData</Role>
      <ShortName>Shareholder Fees</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>020020 - Schedule - Annual Fund Operating Expenses</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/rr/role/OperatingExpensesData</Role>
      <ShortName>Annual Fund Operating Expenses</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>020040 - Schedule - Expense Example, No Redemption {Transposed}</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption</Role>
      <ShortName>Expense Example, No Redemption</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>020060 - Schedule - Average Annual Total Returns {Transposed}</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/rr/role/PerformanceTableData</Role>
      <ShortName>Average Annual Total Returns</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>030000 - Document - Risk/Return Detail {Unlabeled}</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/rr/role/RiskReturnDetail</Role>
      <ShortName>Risk/Return Detail</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>10 - Schedule -  (Vanguard S&amp;P Mid-Cap 400 Value Index Fund ETF)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vanguard/role/S000030015ETF</Role>
      <ShortName>(Vanguard S&amp;P Mid-Cap 400 Value Index Fund ETF)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>11 - Schedule -  (Vanguard S&amp;P Mid-Cap 400 Value Index Fund Institutional)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vanguard/role/S000030015Institutional</Role>
      <ShortName>(Vanguard S&amp;P Mid-Cap 400 Value Index Fund Institutional)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>14 - Schedule -  (Vanguard S&amp;P Small-Cap 600 Index Fund ETF)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vanguard/role/S000030017ETF</Role>
      <ShortName>(Vanguard S&amp;P Small-Cap 600 Index Fund ETF)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>15 - Schedule -  (Vanguard S&amp;P Small-Cap 600 Index Fund Institutional)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vanguard/role/S000030017Institutional</Role>
      <ShortName>(Vanguard S&amp;P Small-Cap 600 Index Fund Institutional)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>16 - Schedule -  (Vanguard S&amp;P Small-Cap 600 Value Index Fund ETF)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vanguard/role/S000030019ETF</Role>
      <ShortName>(Vanguard S&amp;P Small-Cap 600 Value Index Fund ETF)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>17 - Schedule -  (Vanguard S&amp;P Small-Cap 600 Value Index Fund Institutional)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vanguard/role/S000030019Institutional</Role>
      <ShortName>(Vanguard S&amp;P Small-Cap 600 Value Index Fund Institutional)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R87.htm</HtmlFileName>
      <LongName>8 - Schedule -  (Vanguard S&amp;P Mid-Cap 400 Index Fund ETF)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vanguard/role/S000030014ETF</Role>
      <ShortName>(Vanguard S&amp;P Mid-Cap 400 Index Fund ETF)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R88.htm</HtmlFileName>
      <LongName>9 - Schedule -  (Vanguard S&amp;P Mid-Cap 400 Index Fund Institutional)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vanguard/role/S000030014Institutional</Role>
      <ShortName>(Vanguard S&amp;P Mid-Cap 400 Index Fund Institutional)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9999.htm</HtmlFileName>
      <LongName>Uncategorized Items</LongName>
      <ReportType>Sheet</ReportType>
      <Role />
      <ShortName>Uncategorized Items</ShortName>
    </Report>
    <Report>
      <IsDefault>true</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <Logs>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
    <Log type="Warning">Warning: The selection of the following command, 'rr_ProspectusShareClassAxis', did not match any values available on this report:
row rr_ProspectusShareClassAxis compact *</Log>
  </Logs>
  <InputFiles>
    <File>admiral-20121228.xml</File>
    <File>admiral-20121228.xsd</File>
    <File>admiral-20121228_cal.xml</File>
    <File>admiral-20121228_def.xml</File>
    <File>admiral-20121228_lab.xml</File>
    <File>admiral-20121228_pre.xml</File>
  </InputFiles>
  <SupplementalFiles>
    <File>BarChart1.jpg</File>
    <File>BarChart2.jpg</File>
    <File>BarChart3.jpg</File>
    <File>BarChart4.jpg</File>
    <File>BarChart5.jpg</File>
    <File>BarChart6.jpg</File>
    <File>BarChart7.jpg</File>
    <File>BarChart8.jpg</File>
    <File>BarChart9.jpg</File>
    <File>BarChart10.jpg</File>
    <File>BarChart11.jpg</File>
    <File>BarChart12.jpg</File>
    <File>BarChart13.jpg</File>
    <File>BarChart14.jpg</File>
    <File>BarChart15.jpg</File>
    <File>BarChart16.jpg</File>
    <File>BarChart17.jpg</File>
    <File>BarChart18.jpg</File>
  </SupplementalFiles>
  <BaseTaxonomies />
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
