<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.24.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>69</ContextCount>
  <ElementCount>87</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>38</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>2</UnitCount>
  <MyReports>
    <Report instance="ck0000737520-20240325.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>000001 - Document - Document and Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dryfus.com/20240325/role/DocumentAndEntityInformation</Role>
      <ShortName>Document and Entity Information</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="ck0000737520-20240325.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>020000 - Document - Risk/Return Summary {Unlabeled} - BNY Mellon Global Stock Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dryfus.com/20240325/role/DocumentRiskReturnSummaryUnlabeledBNYMellonGlobalStockFund</Role>
      <ShortName>Risk/Return Summary- BNY Mellon Global Stock Fund</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="ck0000737520-20240325.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>020007 - Disclosure - Risk/Return Detail Data {Elements} - BNY Mellon Global Stock Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dryfus.com/20240325/role/DisclosureRiskReturnDetailDataElementsBNYMellonGlobalStockFund</Role>
      <ShortName>Risk/Return Detail Data- BNY Mellon Global Stock Fund</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="ck0000737520-20240325.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>020008 - Document - Risk/Return Summary {Unlabeled} - BNY Mellon International Stock Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dryfus.com/20240325/role/DocumentRiskReturnSummaryUnlabeledBNYMellonInternationalStockFund</Role>
      <ShortName>Risk/Return Summary- BNY Mellon International Stock Fund</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="ck0000737520-20240325.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>020015 - Disclosure - Risk/Return Detail Data {Elements} - BNY Mellon International Stock Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dryfus.com/20240325/role/DisclosureRiskReturnDetailDataElementsBNYMellonInternationalStockFund</Role>
      <ShortName>Risk/Return Detail Data- BNY Mellon International Stock Fund</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="ck0000737520-20240325.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>020016 - Document - Risk/Return Summary {Unlabeled} - BNY Mellon Select Managers Small Cap Value Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dryfus.com/20240325/role/DocumentRiskReturnSummaryUnlabeledBNYMellonSelectManagersSmallCapValueFund</Role>
      <ShortName>Risk/Return Summary- BNY Mellon Select Managers Small Cap Value Fund</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="ck0000737520-20240325.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>020023 - Disclosure - Risk/Return Detail Data {Elements} - BNY Mellon Select Managers Small Cap Value Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dryfus.com/20240325/role/DisclosureRiskReturnDetailDataElementsBNYMellonSelectManagersSmallCapValueFund</Role>
      <ShortName>Risk/Return Detail Data- BNY Mellon Select Managers Small Cap Value Fund</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="ck0000737520-20240325.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>020024 - Document - Risk/Return Summary {Unlabeled} - BNY Mellon U.S. Equity Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dryfus.com/20240325/role/DocumentRiskReturnSummaryUnlabeledBNYMellonUSEquityFund</Role>
      <ShortName>Risk/Return Summary- BNY Mellon U.S. Equity Fund</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="ck0000737520-20240325.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>020031 - Disclosure - Risk/Return Detail Data {Elements} - BNY Mellon U.S. Equity Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dryfus.com/20240325/role/DisclosureRiskReturnDetailDataElementsBNYMellonUSEquityFund</Role>
      <ShortName>Risk/Return Detail Data- BNY Mellon U.S. Equity Fund</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File doctype="485BPOS" isN1a="true" isRR="true" isRRorOEF="true" original="ck0000737520-20240325.htm">ck0000737520-20240325.htm</File>
    <File>ck0000737520-20240325.xsd</File>
    <File>ck0000737520-20240325_cal.xml</File>
    <File>ck0000737520-20240325_def.xml</File>
    <File>ck0000737520-20240325_lab.xml</File>
    <File>ck0000737520-20240325_pre.xml</File>
  </InputFiles>
  <SupplementalFiles>
    <File>img_0c86b0ee35bb4f4.jpg</File>
    <File>img_26d65d8e9d5e4f2.jpg</File>
    <File>img_270c849628a24f3.jpg</File>
    <File>img_39f1cdb4219a4f4.jpg</File>
    <File>img_3bc2632c0aef4f2.jpg</File>
    <File>img_4d5635ed60474f5.jpg</File>
    <File>img_7b94f99f52234f5.jpg</File>
    <File>img_7cdfd9459d5e4f3.jpg</File>
    <File>BarChart1.png</File>
    <File>BarChart2.png</File>
    <File>BarChart3.png</File>
    <File>BarChart4.png</File>
    <File>BarChart1.png</File>
    <File>BarChart2.png</File>
    <File>BarChart3.png</File>
    <File>BarChart4.png</File>
  </SupplementalFiles>
  <BaseTaxonomies>
    <BaseTaxonomy items="24">http://xbrl.sec.gov/dei/2023</BaseTaxonomy>
    <BaseTaxonomy items="611">http://xbrl.sec.gov/rr/2023</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
