<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.23.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>33</ContextCount>
  <ElementCount>90</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>26</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>2</UnitCount>
  <MyReports>
    <Report instance="ck0000737520-20230324.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.bny.com/20230324/role/DocumentAndEntityInformation</Role>
      <ShortName>Document and Entity Information</ShortName>
      <MenuCategory></MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="ck0000737520-20230324.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.bny.com/20230324/role/DocumentRiskReturnSummaryUnlabeledBNYMellonGlobalStockFund</Role>
      <ShortName>Risk/Return Summary- BNY Mellon Global Stock Fund</ShortName>
      <MenuCategory></MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="ck0000737520-20230324.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.bny.com/20230324/role/DisclosureRiskReturnDetailDataElementsBNYMellonGlobalStockFund</Role>
      <ShortName>Risk/Return Detail Data- BNY Mellon Global Stock Fund</ShortName>
      <MenuCategory></MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="ck0000737520-20230324.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.bny.com/20230324/role/DocumentRiskReturnSummaryUnlabeledBNYMellonInternationalStockFund</Role>
      <ShortName>Risk/Return Summary- BNY Mellon International Stock Fund</ShortName>
      <MenuCategory></MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="ck0000737520-20230324.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.bny.com/20230324/role/DisclosureRiskReturnDetailDataElementsBNYMellonInternationalStockFund</Role>
      <ShortName>Risk/Return Detail Data- BNY Mellon International Stock Fund</ShortName>
      <MenuCategory></MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="ck0000737520-20230324.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.bny.com/20230324/role/DocumentRiskReturnSummaryUnlabeledBNYMellonSelectManagersSmallCapValueFund</Role>
      <ShortName>Risk/Return Summary- BNY Mellon Select Managers Small Cap Value Fund</ShortName>
      <MenuCategory></MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="ck0000737520-20230324.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.bny.com/20230324/role/DisclosureRiskReturnDetailDataElementsBNYMellonSelectManagersSmallCapValueFund</Role>
      <ShortName>Risk/Return Detail Data- BNY Mellon Select Managers Small Cap Value Fund</ShortName>
      <MenuCategory></MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="ck0000737520-20230324.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.bny.com/20230324/role/DocumentRiskReturnSummaryUnlabeledBNYMellonUSEquityFund</Role>
      <ShortName>Risk/Return Summary- BNY Mellon U.S. Equity Fund</ShortName>
      <MenuCategory></MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="ck0000737520-20230324.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.bny.com/20230324/role/DisclosureRiskReturnDetailDataElementsBNYMellonUSEquityFund</Role>
      <ShortName>Risk/Return Detail Data- BNY Mellon U.S. Equity Fund</ShortName>
      <MenuCategory></MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="ck0000737520-20230324.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.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>
      <MenuCategory></MenuCategory>
      <Position>10</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <Logs>
    <Log type="Warning">[dq-0542-Deprecated-Concept] Concept RiskNarrativeTextBlock in rr/2022 used in 4 facts was deprecated in rr/2023 as of 2023-01-31 and should not be used. ck0000737520-20230324.htm 702, 5420, 10199, 15068</Log>
    <Log type="Warning">[dq-0542-Deprecated-Concept] Concept RiskNotInsured in rr/2022 used in 4 facts was deprecated in rr/2023 as of 2023-01-31 and should not be used. ck0000737520-20230324.htm 704, 5422, 10201, 15070</Log>
    <Log type="Warning">[dq-0542-Deprecated-Concept] Concept RiskLoseMoney in rr/2022 used in 4 facts was deprecated in rr/2023 as of 2023-01-31 and should not be used. ck0000737520-20230324.htm 706, 5424, 10203, 15072</Log>
    <Log type="Warning">[ix-0514-Hidden-Fact-Eligible-For-Transform] WARN: 5 fact(s) appearing in ix:hidden were eligible for transformation: rr:AverageAnnualReturnYear05 -  ck0000737520-20230324.htm 63451, 63452, 63453, 63454, 63455</Log>
  </Logs>
  <InputFiles>
    <File doctype="485BPOS" original="ck0000737520-20230324.htm">ck0000737520-20230324.htm</File>
    <File>ck0000737520-20230324.xsd</File>
    <File>ck0000737520-20230324_cal.xml</File>
    <File>ck0000737520-20230324_def.xml</File>
    <File>ck0000737520-20230324_lab.xml</File>
    <File>ck0000737520-20230324_pre.xml</File>
    <File>d16-expenselimitationagrmt.htm</File>
    <File>d18-expenselimitationagrmt.htm</File>
    <File>d3-denalisubadvisory.htm</File>
    <File>g3-poa_32023.htm</File>
    <File>h2-taagreement932021.htm</File>
    <File>j2-consent32023.htm</File>
    <File>p4-denalicodeofethics.htm</File>
  </InputFiles>
  <SupplementalFiles>
    <File>img_0179da7d48f24f3.jpg</File>
    <File>img_032e954bb55f4f5.jpg</File>
    <File>img_31f36dea219b4f4.jpg</File>
    <File>img_6ca40a6010054f4.jpg</File>
    <File>img_8ba8450bcda64f2.jpg</File>
    <File>img_d036d7310e3e4f2.jpg</File>
    <File>img_d54ed0d19f744f5.jpg</File>
    <File>img_f46ae90e43ee4f3.jpg</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/2022</BaseTaxonomy>
    <BaseTaxonomy items="591">http://xbrl.sec.gov/rr/2022</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
