<?xml version="1.0" encoding="utf-8"?>
<FilingSummary xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <Version>2.4.0.8</Version>
  <ProcessingTime />
  <ReportFormat>HtmlAndXml</ReportFormat>
  <ContextCount>41</ContextCount>
  <ElementCount>90</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>32</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>2</UnitCount>
  <MyReports>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>000001 - Document - Document and Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dreyfus.com/20130625/role/DocumentAndEntityInformation</Role>
      <ShortName>Document and Entity Information</ShortName>
      <XmlFileName>R1.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>020000 - Document - Risk/Return Summary {Unlabeled} - Dreyfus Select Managers Small Cap Growth Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dreyfus.com/20130625/role/DocumentRiskReturnSummaryUnlabeledDreyfusSelectManagersSmallCapGrowthFund</Role>
      <ShortName>Risk/Return Summary  - Dreyfus Select Managers Small Cap Growth Fund</ShortName>
      <XmlFileName>R2.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>020007 - Disclosure - Risk/Return Detail Data {Elements} - Dreyfus Select Managers Small Cap Growth Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dreyfus.com/20130625/role/DisclosureRiskReturnDetailDataElementsDreyfusSelectManagersSmallCapGrowthFund</Role>
      <ShortName>Risk/Return Detail Data  - Dreyfus Select Managers Small Cap Growth Fund</ShortName>
      <XmlFileName>R9.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>020008 - Document - Risk/Return Summary {Unlabeled} - Dreyfus Select Managers Small Cap Value Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dreyfus.com/20130625/role/DocumentRiskReturnSummaryUnlabeledDreyfusSelectManagersSmallCapValueFund</Role>
      <ShortName>Risk/Return Summary  - Dreyfus Select Managers Small Cap Value Fund</ShortName>
      <XmlFileName>R10.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>020015 - Disclosure - Risk/Return Detail Data {Elements} - Dreyfus Select Managers Small Cap Value Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dreyfus.com/20130625/role/DisclosureRiskReturnDetailDataElementsDreyfusSelectManagersSmallCapValueFund</Role>
      <ShortName>Risk/Return Detail Data  - Dreyfus Select Managers Small Cap Value Fund</ShortName>
      <XmlFileName>R17.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>020016 - Document - Risk/Return Summary {Unlabeled} - Dreyfus U.S. Equity Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dreyfus.com/20130625/role/DocumentRiskReturnSummaryUnlabeledDreyfusUSEquityFund</Role>
      <ShortName>Risk/Return Summary  - Dreyfus U.S. Equity Fund</ShortName>
      <XmlFileName>R18.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>020023 - Disclosure - Risk/Return Detail Data {Elements} - Dreyfus U.S. Equity Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dreyfus.com/20130625/role/DisclosureRiskReturnDetailDataElementsDreyfusUSEquityFund</Role>
      <ShortName>Risk/Return Detail Data  - Dreyfus U.S. Equity Fund</ShortName>
      <XmlFileName>R25.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>020024 - Document - Risk/Return Summary {Unlabeled} - Global Stock Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dreyfus.com/20130625/role/DocumentRiskReturnSummaryUnlabeledGlobalStockFund</Role>
      <ShortName>Risk/Return Summary  - Global Stock Fund</ShortName>
      <XmlFileName>R26.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>020031 - Disclosure - Risk/Return Detail Data {Elements} - Global Stock Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dreyfus.com/20130625/role/DisclosureRiskReturnDetailDataElementsGlobalStockFund</Role>
      <ShortName>Risk/Return Detail Data  - Global Stock Fund</ShortName>
      <XmlFileName>R33.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>020032 - Document - Risk/Return Summary {Unlabeled} - International Stock Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dreyfus.com/20130625/role/DocumentRiskReturnSummaryUnlabeledInternationalStockFund</Role>
      <ShortName>Risk/Return Summary  - International Stock Fund</ShortName>
      <XmlFileName>R34.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>020039 - Disclosure - Risk/Return Detail Data {Elements} - International Stock Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dreyfus.com/20130625/role/DisclosureRiskReturnDetailDataElementsInternationalStockFund</Role>
      <ShortName>Risk/Return Detail Data  - International Stock Fund</ShortName>
      <XmlFileName>R41.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.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>
      <XmlFileName>R42.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>true</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <Logs />
  <InputFiles>
    <File>ck0000737520-20130625.xml</File>
    <File>ck0000737520-20130625.xsd</File>
    <File>ck0000737520-20130625_cal.xml</File>
    <File>ck0000737520-20130625_def.xml</File>
    <File>ck0000737520-20130625_lab.xml</File>
    <File>ck0000737520-20130625_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>
  </SupplementalFiles>
  <BaseTaxonomies />
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
