<?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>2.2.0.25</Version>
  <ReportType />
  <MyReports>
    <Report>
      <IsDefault>true</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>010000 - Document - Risk/Return Summary {Unlabeled}</LongName>
      <ShortName>Risk/Return Summary</ShortName>
      <Role>http://xbrl.sec.gov/rr/role/RiskReturn</Role>
      <ContainEmbeddedReports>true</ContainEmbeddedReports>
      <XmlFileName>R1.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>010002 - Document - Equity Fund Inc {Unlabeled}</LongName>
      <ShortName>Equity Fund Inc</ShortName>
      <Role>http://oppenheimer/role/AAAA</Role>
      <ContainEmbeddedReports>true</ContainEmbeddedReports>
      <XmlFileName>R2.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>020010 - Schedule - Shareholder Fees</LongName>
      <ShortName>Shareholder Fees</ShortName>
      <Role>http://xbrl.sec.gov/rr/role/ShareholderFeesData</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R3.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>020020 - Schedule - Annual Fund Operating Expenses</LongName>
      <ShortName>Annual Fund Operating Expenses</ShortName>
      <Role>http://xbrl.sec.gov/rr/role/OperatingExpensesData</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R5.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>020060 - Schedule - Average Annual Total Returns {Transposed}</LongName>
      <ShortName>Average Annual Total Returns</ShortName>
      <Role>http://xbrl.sec.gov/rr/role/PerformanceTableData</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R13.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>030000 - Document - Risk/Return Detail {Unlabeled}</LongName>
      <ShortName>Risk/Return Detail</ShortName>
      <Role>http://xbrl.sec.gov/rr/role/RiskReturnDetail</Role>
      <ContainEmbeddedReports>true</ContainEmbeddedReports>
      <XmlFileName>R15.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Book</ReportType>
      <LongName>All Reports</LongName>
      <ShortName>All Reports</ShortName>
      <Role />
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName />
    </Report>
  </MyReports>
  <EntityCount>1</EntityCount>
  <ContextCount>13</ContextCount>
  <SegmentCount>13</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <UnitCount>4</UnitCount>
  <ElementCount>68</ElementCount>
  <FootnotesReported>true</FootnotesReported>
  <TuplesReported>false</TuplesReported>
  <ContextSummary>
    <ContextSummary>
      <ContextName>c_S000008467_C000023202_AAAA</ContextName>
      <ElementCount>20</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>c_S000008467_C000023201_AfterTaxesOnDistributions_AAAA</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>c_S000008467_C000023201_AfterTaxesOnDistributionsAndSales_AAAA</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>c_S000008467_C000023203_AAAA</ContextName>
      <ElementCount>20</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>c_S000008467_AAAA</ContextName>
      <ElementCount>41</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>c_S000008467_C000023204_AAAA</ContextName>
      <ElementCount>20</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>c_S000008467_Benchmark004_AAAA</ContextName>
      <ElementCount>1</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>c</ContextName>
      <ElementCount>7</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>c_S000008467_Russ1kIndex_AAAA</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>c_S000008467_russ1kindex01_AAAA</ContextName>
      <ElementCount>1</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>c_S000008467_SandP500Index_AAAA</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>c_S000008467_C000023205_AAAA</ContextName>
      <ElementCount>20</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>c_S000008467_C000023201_AAAA</ContextName>
      <ElementCount>20</ElementCount>
    </ContextSummary>
  </ContextSummary>
  <BaseTaxonomies />
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
