<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.20.4</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>271</ContextCount>
  <ElementCount>193</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>165</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>2</UnitCount>
  <MyReports>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>000001 - Document - Document and Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DocumentAndEntityInformation</Role>
      <ShortName>Document and Entity Information</ShortName>
      <MenuCategory></MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>020000 - Document - Risk/Return Summary {Unlabeled} - Class A Shares (NDGAX), Class C Shares (NDGCX), Institutional Class Shares (NDGIX) - Neuberger Berman Dividend Growth Fund (Class A, Class C, Class Institutional)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DocumentRiskReturnSummaryUnlabeledClassASharesNDGAXClassCSharesNDGCXInstitutionalClassSharesNDGIXNeubergerBermanDividendGrowthFundClassAClassCClassInstitutional</Role>
      <ShortName>Risk/Return Summary- Class A Shares (NDGAX), Class C Shares (NDGCX), Institutional Class Shares (NDGIX) - Neuberger Berman Dividend Growth Fund (Class A, Class C, Class Institutional)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>020007 - Disclosure - Risk/Return Detail Data {Elements} - Class A Shares (NDGAX), Class C Shares (NDGCX), Institutional Class Shares (NDGIX) - Neuberger Berman Dividend Growth Fund (Class A, Class C, Class Institutional)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DisclosureRiskReturnDetailDataElementsClassASharesNDGAXClassCSharesNDGCXInstitutionalClassSharesNDGIXNeubergerBermanDividendGrowthFundClassAClassCClassInstitutional</Role>
      <ShortName>Risk/Return Detail Data- Class A Shares (NDGAX), Class C Shares (NDGCX), Institutional Class Shares (NDGIX) - Neuberger Berman Dividend Growth Fund (Class A, Class C, Class Institutional)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>020008 - Document - Risk/Return Summary {Unlabeled} - Class A Shares (NEMAX), Class C Shares (NEMCX), Institutional Class Shares (NEMIX) - Neuberger Berman Emerging Markets Equity Fund (Class A, Class C, Institutional Class)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DocumentRiskReturnSummaryUnlabeledClassASharesNEMAXClassCSharesNEMCXInstitutionalClassSharesNEMIXNeubergerBermanEmergingMarketsEquityFundClassAClassCInstitutionalClass</Role>
      <ShortName>Risk/Return Summary- Class A Shares (NEMAX), Class C Shares (NEMCX), Institutional Class Shares (NEMIX) - Neuberger Berman Emerging Markets Equity Fund (Class A, Class C, Institutional Class)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>020015 - Disclosure - Risk/Return Detail Data {Elements} - Class A Shares (NEMAX), Class C Shares (NEMCX), Institutional Class Shares (NEMIX) - Neuberger Berman Emerging Markets Equity Fund (Class A, Class C, Institutional Class)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DisclosureRiskReturnDetailDataElementsClassASharesNEMAXClassCSharesNEMCXInstitutionalClassSharesNEMIXNeubergerBermanEmergingMarketsEquityFundClassAClassCInstitutionalClass</Role>
      <ShortName>Risk/Return Detail Data- Class A Shares (NEMAX), Class C Shares (NEMCX), Institutional Class Shares (NEMIX) - Neuberger Berman Emerging Markets Equity Fund (Class A, Class C, Institutional Class)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>020016 - Document - Risk/Return Summary {Unlabeled} - Class A Shares (NBHAX), Class C Shares (NBHCX), Institutional Class Shares (NBHIX) - Neuberger Berman Equity Income Fund (Class A, Class C, Institutional Class)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DocumentRiskReturnSummaryUnlabeledClassASharesNBHAXClassCSharesNBHCXInstitutionalClassSharesNBHIXNeubergerBermanEquityIncomeFundClassAClassCInstitutionalClass</Role>
      <ShortName>Risk/Return Summary- Class A Shares (NBHAX), Class C Shares (NBHCX), Institutional Class Shares (NBHIX) - Neuberger Berman Equity Income Fund (Class A, Class C, Institutional Class)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>020023 - Disclosure - Risk/Return Detail Data {Elements} - Class A Shares (NBHAX), Class C Shares (NBHCX), Institutional Class Shares (NBHIX) - Neuberger Berman Equity Income Fund (Class A, Class C, Institutional Class)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DisclosureRiskReturnDetailDataElementsClassASharesNBHAXClassCSharesNBHCXInstitutionalClassSharesNBHIXNeubergerBermanEquityIncomeFundClassAClassCInstitutionalClass</Role>
      <ShortName>Risk/Return Detail Data- Class A Shares (NBHAX), Class C Shares (NBHCX), Institutional Class Shares (NBHIX) - Neuberger Berman Equity Income Fund (Class A, Class C, Institutional Class)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>020024 - Document - Risk/Return Summary {Unlabeled} - Class A Shares (NFAAX), Class C Shares (NFACX), Institutional Class Shares (NFALX) - Neuberger Berman Focus Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DocumentRiskReturnSummaryUnlabeledClassASharesNFAAXClassCSharesNFACXInstitutionalClassSharesNFALXNeubergerBermanFocusFund</Role>
      <ShortName>Risk/Return Summary- Class A Shares (NFAAX), Class C Shares (NFACX), Institutional Class Shares (NFALX) - Neuberger Berman Focus Fund</ShortName>
      <MenuCategory></MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>020031 - Disclosure - Risk/Return Detail Data {Elements} - Class A Shares (NFAAX), Class C Shares (NFACX), Institutional Class Shares (NFALX) - Neuberger Berman Focus Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DisclosureRiskReturnDetailDataElementsClassASharesNFAAXClassCSharesNFACXInstitutionalClassSharesNFALXNeubergerBermanFocusFund</Role>
      <ShortName>Risk/Return Detail Data- Class A Shares (NFAAX), Class C Shares (NFACX), Institutional Class Shares (NFALX) - Neuberger Berman Focus Fund</ShortName>
      <MenuCategory></MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>020032 - Document - Risk/Return Summary {Unlabeled} - Institutional Class Shares (NBGIX) - Neuberger Berman Genesis Fund (Institutional Class)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DocumentRiskReturnSummaryUnlabeledInstitutionalClassSharesNBGIXNeubergerBermanGenesisFundInstitutionalClass</Role>
      <ShortName>Risk/Return Summary- Institutional Class Shares (NBGIX) - Neuberger Berman Genesis Fund (Institutional Class)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>020038 - Disclosure - Risk/Return Detail Data {Elements} - Institutional Class Shares (NBGIX) - Neuberger Berman Genesis Fund (Institutional Class)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DisclosureRiskReturnDetailDataElementsInstitutionalClassSharesNBGIXNeubergerBermanGenesisFundInstitutionalClass</Role>
      <ShortName>Risk/Return Detail Data- Institutional Class Shares (NBGIX) - Neuberger Berman Genesis Fund (Institutional Class)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>020039 - Document - Risk/Return Summary {Unlabeled} - Class A Shares (NGRAX), Class C Shares (NGRCX), Institutional Class Shares (NGRIX) - Neuberger Berman Global Real Estate Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DocumentRiskReturnSummaryUnlabeledClassASharesNGRAXClassCSharesNGRCXInstitutionalClassSharesNGRIXNeubergerBermanGlobalRealEstateFund</Role>
      <ShortName>Risk/Return Summary- Class A Shares (NGRAX), Class C Shares (NGRCX), Institutional Class Shares (NGRIX) - Neuberger Berman Global Real Estate Fund</ShortName>
      <MenuCategory></MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>020046 - Disclosure - Risk/Return Detail Data {Elements} - Class A Shares (NGRAX), Class C Shares (NGRCX), Institutional Class Shares (NGRIX) - Neuberger Berman Global Real Estate Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DisclosureRiskReturnDetailDataElementsClassASharesNGRAXClassCSharesNGRCXInstitutionalClassSharesNGRIXNeubergerBermanGlobalRealEstateFund</Role>
      <ShortName>Risk/Return Detail Data- Class A Shares (NGRAX), Class C Shares (NGRCX), Institutional Class Shares (NGRIX) - Neuberger Berman Global Real Estate Fund</ShortName>
      <MenuCategory></MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>020047 - Document - Risk/Return Summary {Unlabeled} - Class A Shares (NCEAX), Class C Shares (NCECX), Institutional Class Shares (NCEIX) - Neuberger Berman Greater China Equity Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DocumentRiskReturnSummaryUnlabeledClassASharesNCEAXClassCSharesNCECXInstitutionalClassSharesNCEIXNeubergerBermanGreaterChinaEquityFund</Role>
      <ShortName>Risk/Return Summary- Class A Shares (NCEAX), Class C Shares (NCECX), Institutional Class Shares (NCEIX) - Neuberger Berman Greater China Equity Fund</ShortName>
      <MenuCategory></MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>020054 - Disclosure - Risk/Return Detail Data {Elements} - Class A Shares (NCEAX), Class C Shares (NCECX), Institutional Class Shares (NCEIX) - Neuberger Berman Greater China Equity Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DisclosureRiskReturnDetailDataElementsClassASharesNCEAXClassCSharesNCECXInstitutionalClassSharesNCEIXNeubergerBermanGreaterChinaEquityFund</Role>
      <ShortName>Risk/Return Detail Data- Class A Shares (NCEAX), Class C Shares (NCECX), Institutional Class Shares (NCEIX) - Neuberger Berman Greater China Equity Fund</ShortName>
      <MenuCategory></MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>020055 - Document - Risk/Return Summary {Unlabeled} - Class A Shares (NGDAX), Class C Shares (NGDCX), Institutional Class Shares (NGDLX) - Neuberger Berman Guardian Fund (Class A, Class C, Institutional Class)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DocumentRiskReturnSummaryUnlabeledClassASharesNGDAXClassCSharesNGDCXInstitutionalClassSharesNGDLXNeubergerBermanGuardianFundClassAClassCInstitutionalClass</Role>
      <ShortName>Risk/Return Summary- Class A Shares (NGDAX), Class C Shares (NGDCX), Institutional Class Shares (NGDLX) - Neuberger Berman Guardian Fund (Class A, Class C, Institutional Class)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>020062 - Disclosure - Risk/Return Detail Data {Elements} - Class A Shares (NGDAX), Class C Shares (NGDCX), Institutional Class Shares (NGDLX) - Neuberger Berman Guardian Fund (Class A, Class C, Institutional Class)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DisclosureRiskReturnDetailDataElementsClassASharesNGDAXClassCSharesNGDCXInstitutionalClassSharesNGDLXNeubergerBermanGuardianFundClassAClassCInstitutionalClass</Role>
      <ShortName>Risk/Return Detail Data- Class A Shares (NGDAX), Class C Shares (NGDCX), Institutional Class Shares (NGDLX) - Neuberger Berman Guardian Fund (Class A, Class C, Institutional Class)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>020063 - Document - Risk/Return Summary {Unlabeled} - Class A Shares (NGQAX), Class C Shares (NGQCX), Institutional Class Shares (NGQIX) - Neuberger Berman Integrated Large Cap Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DocumentRiskReturnSummaryUnlabeledClassASharesNGQAXClassCSharesNGQCXInstitutionalClassSharesNGQIXNeubergerBermanIntegratedLargeCapFund</Role>
      <ShortName>Risk/Return Summary- Class A Shares (NGQAX), Class C Shares (NGQCX), Institutional Class Shares (NGQIX) - Neuberger Berman Integrated Large Cap Fund</ShortName>
      <MenuCategory></MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>020070 - Disclosure - Risk/Return Detail Data {Elements} - Class A Shares (NGQAX), Class C Shares (NGQCX), Institutional Class Shares (NGQIX) - Neuberger Berman Integrated Large Cap Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DisclosureRiskReturnDetailDataElementsClassASharesNGQAXClassCSharesNGQCXInstitutionalClassSharesNGQIXNeubergerBermanIntegratedLargeCapFund</Role>
      <ShortName>Risk/Return Detail Data- Class A Shares (NGQAX), Class C Shares (NGQCX), Institutional Class Shares (NGQIX) - Neuberger Berman Integrated Large Cap Fund</ShortName>
      <MenuCategory></MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>020071 - Document - Risk/Return Summary {Unlabeled} - Class A Shares (NIQAX), Class C Shares (NIQCX), Institutional Class (NBIIX) - Neuberger Berman International Equity Fund (Class A, Class C, Institutional Class)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DocumentRiskReturnSummaryUnlabeledClassASharesNIQAXClassCSharesNIQCXInstitutionalClassNBIIXNeubergerBermanInternationalEquityFundClassAClassCInstitutionalClass</Role>
      <ShortName>Risk/Return Summary- Class A Shares (NIQAX), Class C Shares (NIQCX), Institutional Class (NBIIX) - Neuberger Berman International Equity Fund (Class A, Class C, Institutional Class)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R80.htm</HtmlFileName>
      <LongName>020078 - Disclosure - Risk/Return Detail Data {Elements} - Class A Shares (NIQAX), Class C Shares (NIQCX), Institutional Class (NBIIX) - Neuberger Berman International Equity Fund (Class A, Class C, Institutional Class)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DisclosureRiskReturnDetailDataElementsClassASharesNIQAXClassCSharesNIQCXInstitutionalClassNBIIXNeubergerBermanInternationalEquityFundClassAClassCInstitutionalClass</Role>
      <ShortName>Risk/Return Detail Data- Class A Shares (NIQAX), Class C Shares (NIQCX), Institutional Class (NBIIX) - Neuberger Berman International Equity Fund (Class A, Class C, Institutional Class)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R81.htm</HtmlFileName>
      <LongName>020079 - Document - Risk/Return Summary {Unlabeled} - Class A Shares (NBNAX), Class C Shares (NBNCX), Institutional Class Shares (NILIX) - Neuberger Berman International Select Fund (Class A, Class C, Institutional)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DocumentRiskReturnSummaryUnlabeledClassASharesNBNAXClassCSharesNBNCXInstitutionalClassSharesNILIXNeubergerBermanInternationalSelectFundClassAClassCInstitutional</Role>
      <ShortName>Risk/Return Summary- Class A Shares (NBNAX), Class C Shares (NBNCX), Institutional Class Shares (NILIX) - Neuberger Berman International Select Fund (Class A, Class C, Institutional)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R88.htm</HtmlFileName>
      <LongName>020086 - Disclosure - Risk/Return Detail Data {Elements} - Class A Shares (NBNAX), Class C Shares (NBNCX), Institutional Class Shares (NILIX) - Neuberger Berman International Select Fund (Class A, Class C, Institutional)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DisclosureRiskReturnDetailDataElementsClassASharesNBNAXClassCSharesNBNCXInstitutionalClassSharesNILIXNeubergerBermanInternationalSelectFundClassAClassCInstitutional</Role>
      <ShortName>Risk/Return Detail Data- Class A Shares (NBNAX), Class C Shares (NBNCX), Institutional Class Shares (NILIX) - Neuberger Berman International Select Fund (Class A, Class C, Institutional)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R89.htm</HtmlFileName>
      <LongName>020087 - Document - Risk/Return Summary {Unlabeled} - Class A Shares (NIOAX), Class C Shares (NIOCX), Institutional Class Shares (NIOIX) - Neuberger Berman International Small Cap Fund (Class A, Class C, Institutional Class)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DocumentRiskReturnSummaryUnlabeledClassASharesNIOAXClassCSharesNIOCXInstitutionalClassSharesNIOIXNeubergerBermanInternationalSmallCapFundClassAClassCInstitutionalClass</Role>
      <ShortName>Risk/Return Summary- Class A Shares (NIOAX), Class C Shares (NIOCX), Institutional Class Shares (NIOIX) - Neuberger Berman International Small Cap Fund (Class A, Class C, Institutional Class)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R96.htm</HtmlFileName>
      <LongName>020094 - Disclosure - Risk/Return Detail Data {Elements} - Class A Shares (NIOAX), Class C Shares (NIOCX), Institutional Class Shares (NIOIX) - Neuberger Berman International Small Cap Fund (Class A, Class C, Institutional Class)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DisclosureRiskReturnDetailDataElementsClassASharesNIOAXClassCSharesNIOCXInstitutionalClassSharesNIOIXNeubergerBermanInternationalSmallCapFundClassAClassCInstitutionalClass</Role>
      <ShortName>Risk/Return Detail Data- Class A Shares (NIOAX), Class C Shares (NIOCX), Institutional Class Shares (NIOIX) - Neuberger Berman International Small Cap Fund (Class A, Class C, Institutional Class)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R97.htm</HtmlFileName>
      <LongName>020095 - Document - Risk/Return Summary {Unlabeled} - Class A Shares (NINAX), Class C Shares (NINCX), Institutional Class Shares (NINLX) - Neuberger Berman Intrinsic Value Fund (Class A, Class C, Institutional Class)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DocumentRiskReturnSummaryUnlabeledClassASharesNINAXClassCSharesNINCXInstitutionalClassSharesNINLXNeubergerBermanIntrinsicValueFundClassAClassCInstitutionalClass</Role>
      <ShortName>Risk/Return Summary- Class A Shares (NINAX), Class C Shares (NINCX), Institutional Class Shares (NINLX) - Neuberger Berman Intrinsic Value Fund (Class A, Class C, Institutional Class)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>26</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R104.htm</HtmlFileName>
      <LongName>020102 - Disclosure - Risk/Return Detail Data {Elements} - Class A Shares (NINAX), Class C Shares (NINCX), Institutional Class Shares (NINLX) - Neuberger Berman Intrinsic Value Fund (Class A, Class C, Institutional Class)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DisclosureRiskReturnDetailDataElementsClassASharesNINAXClassCSharesNINCXInstitutionalClassSharesNINLXNeubergerBermanIntrinsicValueFundClassAClassCInstitutionalClass</Role>
      <ShortName>Risk/Return Detail Data- Class A Shares (NINAX), Class C Shares (NINCX), Institutional Class Shares (NINLX) - Neuberger Berman Intrinsic Value Fund (Class A, Class C, Institutional Class)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>27</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R105.htm</HtmlFileName>
      <LongName>020103 - Document - Risk/Return Summary {Unlabeled} - Class A Shares (NPNAX), Class C Shares (NPNCX), Institutional Class Shares (NBPIX) - Neuberger Berman Large Cap Value Fund (Class A, Class C, Institutional Class)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DocumentRiskReturnSummaryUnlabeledClassASharesNPNAXClassCSharesNPNCXInstitutionalClassSharesNBPIXNeubergerBermanLargeCapValueFundClassAClassCInstitutionalClass</Role>
      <ShortName>Risk/Return Summary- Class A Shares (NPNAX), Class C Shares (NPNCX), Institutional Class Shares (NBPIX) - Neuberger Berman Large Cap Value Fund (Class A, Class C, Institutional Class)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>28</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R112.htm</HtmlFileName>
      <LongName>020110 - Disclosure - Risk/Return Detail Data {Elements} - Class A Shares (NPNAX), Class C Shares (NPNCX), Institutional Class Shares (NBPIX) - Neuberger Berman Large Cap Value Fund (Class A, Class C, Institutional Class)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DisclosureRiskReturnDetailDataElementsClassASharesNPNAXClassCSharesNPNCXInstitutionalClassSharesNBPIXNeubergerBermanLargeCapValueFundClassAClassCInstitutionalClass</Role>
      <ShortName>Risk/Return Detail Data- Class A Shares (NPNAX), Class C Shares (NPNCX), Institutional Class Shares (NBPIX) - Neuberger Berman Large Cap Value Fund (Class A, Class C, Institutional Class)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>29</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R113.htm</HtmlFileName>
      <LongName>020111 - Document - Risk/Return Summary {Unlabeled} - Class A Shares (NMGAX), Class C Shares (NMGCX), Institutional Class Shares (NBMLX) - Neuberger Berman Mid Cap Growth Fund (Class A, Class C, Institutional Class)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DocumentRiskReturnSummaryUnlabeledClassASharesNMGAXClassCSharesNMGCXInstitutionalClassSharesNBMLXNeubergerBermanMidCapGrowthFundClassAClassCInstitutionalClass</Role>
      <ShortName>Risk/Return Summary- Class A Shares (NMGAX), Class C Shares (NMGCX), Institutional Class Shares (NBMLX) - Neuberger Berman Mid Cap Growth Fund (Class A, Class C, Institutional Class)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>30</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R120.htm</HtmlFileName>
      <LongName>020118 - Disclosure - Risk/Return Detail Data {Elements} - Class A Shares (NMGAX), Class C Shares (NMGCX), Institutional Class Shares (NBMLX) - Neuberger Berman Mid Cap Growth Fund (Class A, Class C, Institutional Class)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DisclosureRiskReturnDetailDataElementsClassASharesNMGAXClassCSharesNMGCXInstitutionalClassSharesNBMLXNeubergerBermanMidCapGrowthFundClassAClassCInstitutionalClass</Role>
      <ShortName>Risk/Return Detail Data- Class A Shares (NMGAX), Class C Shares (NMGCX), Institutional Class Shares (NBMLX) - Neuberger Berman Mid Cap Growth Fund (Class A, Class C, Institutional Class)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>31</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R121.htm</HtmlFileName>
      <LongName>020119 - Document - Risk/Return Summary {Unlabeled} - Class A Shares (NBRAX), Class C Shares (NBRCX), Institutional Class Shares (NBRTX) - Neuberger Berman Mid Cap Intrinsic Value Fund (Class A, Class C, Institutional Class)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DocumentRiskReturnSummaryUnlabeledClassASharesNBRAXClassCSharesNBRCXInstitutionalClassSharesNBRTXNeubergerBermanMidCapIntrinsicValueFundClassAClassCInstitutionalClass</Role>
      <ShortName>Risk/Return Summary- Class A Shares (NBRAX), Class C Shares (NBRCX), Institutional Class Shares (NBRTX) - Neuberger Berman Mid Cap Intrinsic Value Fund (Class A, Class C, Institutional Class)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>32</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R128.htm</HtmlFileName>
      <LongName>020126 - Disclosure - Risk/Return Detail Data {Elements} - Class A Shares (NBRAX), Class C Shares (NBRCX), Institutional Class Shares (NBRTX) - Neuberger Berman Mid Cap Intrinsic Value Fund (Class A, Class C, Institutional Class)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DisclosureRiskReturnDetailDataElementsClassASharesNBRAXClassCSharesNBRCXInstitutionalClassSharesNBRTXNeubergerBermanMidCapIntrinsicValueFundClassAClassCInstitutionalClass</Role>
      <ShortName>Risk/Return Detail Data- Class A Shares (NBRAX), Class C Shares (NBRCX), Institutional Class Shares (NBRTX) - Neuberger Berman Mid Cap Intrinsic Value Fund (Class A, Class C, Institutional Class)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>33</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R129.htm</HtmlFileName>
      <LongName>020127 - Document - Risk/Return Summary {Unlabeled} - Class A Shares (NMUAX), Class C Shares (NMUCX), Institutional Class Shares (NMULX) - Neuberger Berman Multi-Cap Opportunities Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DocumentRiskReturnSummaryUnlabeledClassASharesNMUAXClassCSharesNMUCXInstitutionalClassSharesNMULXNeubergerBermanMultiCapOpportunitiesFund</Role>
      <ShortName>Risk/Return Summary- Class A Shares (NMUAX), Class C Shares (NMUCX), Institutional Class Shares (NMULX) - Neuberger Berman Multi-Cap Opportunities Fund</ShortName>
      <MenuCategory></MenuCategory>
      <Position>34</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R136.htm</HtmlFileName>
      <LongName>020134 - Disclosure - Risk/Return Detail Data {Elements} - Class A Shares (NMUAX), Class C Shares (NMUCX), Institutional Class Shares (NMULX) - Neuberger Berman Multi-Cap Opportunities Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DisclosureRiskReturnDetailDataElementsClassASharesNMUAXClassCSharesNMUCXInstitutionalClassSharesNMULXNeubergerBermanMultiCapOpportunitiesFund</Role>
      <ShortName>Risk/Return Detail Data- Class A Shares (NMUAX), Class C Shares (NMUCX), Institutional Class Shares (NMULX) - Neuberger Berman Multi-Cap Opportunities Fund</ShortName>
      <MenuCategory></MenuCategory>
      <Position>35</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R137.htm</HtmlFileName>
      <LongName>020135 - Document - Risk/Return Summary {Unlabeled} - Class A Shares (NREAX), Class C Shares (NRECX), Institutional Class Shares (NBRIX) - Neuberger Berman Real Estate Fund (Class A, Class C, Institutional Class)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DocumentRiskReturnSummaryUnlabeledClassASharesNREAXClassCSharesNRECXInstitutionalClassSharesNBRIXNeubergerBermanRealEstateFundClassAClassCInstitutionalClass</Role>
      <ShortName>Risk/Return Summary- Class A Shares (NREAX), Class C Shares (NRECX), Institutional Class Shares (NBRIX) - Neuberger Berman Real Estate Fund (Class A, Class C, Institutional Class)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>36</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R144.htm</HtmlFileName>
      <LongName>020142 - Disclosure - Risk/Return Detail Data {Elements} - Class A Shares (NREAX), Class C Shares (NRECX), Institutional Class Shares (NBRIX) - Neuberger Berman Real Estate Fund (Class A, Class C, Institutional Class)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DisclosureRiskReturnDetailDataElementsClassASharesNREAXClassCSharesNRECXInstitutionalClassSharesNBRIXNeubergerBermanRealEstateFundClassAClassCInstitutionalClass</Role>
      <ShortName>Risk/Return Detail Data- Class A Shares (NREAX), Class C Shares (NRECX), Institutional Class Shares (NBRIX) - Neuberger Berman Real Estate Fund (Class A, Class C, Institutional Class)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>37</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R145.htm</HtmlFileName>
      <LongName>020143 - Document - Risk/Return Summary {Unlabeled} - Class A Shares (NSNAX), Class C Shares (NSNCX), Institutional Class Shares (NBSMX) - Neuberger Berman Small Cap Growth Fund (Class A, Class C, Institutional Class)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DocumentRiskReturnSummaryUnlabeledClassASharesNSNAXClassCSharesNSNCXInstitutionalClassSharesNBSMXNeubergerBermanSmallCapGrowthFundClassAClassCInstitutionalClass</Role>
      <ShortName>Risk/Return Summary- Class A Shares (NSNAX), Class C Shares (NSNCX), Institutional Class Shares (NBSMX) - Neuberger Berman Small Cap Growth Fund (Class A, Class C, Institutional Class)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>38</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R152.htm</HtmlFileName>
      <LongName>020150 - Disclosure - Risk/Return Detail Data {Elements} - Class A Shares (NSNAX), Class C Shares (NSNCX), Institutional Class Shares (NBSMX) - Neuberger Berman Small Cap Growth Fund (Class A, Class C, Institutional Class)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DisclosureRiskReturnDetailDataElementsClassASharesNSNAXClassCSharesNSNCXInstitutionalClassSharesNBSMXNeubergerBermanSmallCapGrowthFundClassAClassCInstitutionalClass</Role>
      <ShortName>Risk/Return Detail Data- Class A Shares (NSNAX), Class C Shares (NSNCX), Institutional Class Shares (NBSMX) - Neuberger Berman Small Cap Growth Fund (Class A, Class C, Institutional Class)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>39</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R153.htm</HtmlFileName>
      <LongName>020151 - Document - Risk/Return Summary {Unlabeled} - Class A Shares (NRAAX), Class C Shares (NRACX), Institutional Class Shares (NBSLX) - Neuberger Berman Sustainable Equity Fund (Class A, Class C, Institutional Class)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DocumentRiskReturnSummaryUnlabeledClassASharesNRAAXClassCSharesNRACXInstitutionalClassSharesNBSLXNeubergerBermanSustainableEquityFundClassAClassCInstitutionalClass</Role>
      <ShortName>Risk/Return Summary- Class A Shares (NRAAX), Class C Shares (NRACX), Institutional Class Shares (NBSLX) - Neuberger Berman Sustainable Equity Fund (Class A, Class C, Institutional Class)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>40</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R160.htm</HtmlFileName>
      <LongName>020158 - Disclosure - Risk/Return Detail Data {Elements} - Class A Shares (NRAAX), Class C Shares (NRACX), Institutional Class Shares (NBSLX) - Neuberger Berman Sustainable Equity Fund (Class A, Class C, Institutional Class)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DisclosureRiskReturnDetailDataElementsClassASharesNRAAXClassCSharesNRACXInstitutionalClassSharesNBSLXNeubergerBermanSustainableEquityFundClassAClassCInstitutionalClass</Role>
      <ShortName>Risk/Return Detail Data- Class A Shares (NRAAX), Class C Shares (NRACX), Institutional Class Shares (NBSLX) - Neuberger Berman Sustainable Equity Fund (Class A, Class C, Institutional Class)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>41</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R161.htm</HtmlFileName>
      <LongName>020159 - Document - Risk/Return Summary {Unlabeled} - Class R6 Shares (NRDGX) - Neuberger Berman Dividend Growth Fund (Class R6)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DocumentRiskReturnSummaryUnlabeledClassR6SharesNRDGXNeubergerBermanDividendGrowthFundClassR6</Role>
      <ShortName>Risk/Return Summary- Class R6 Shares (NRDGX) - Neuberger Berman Dividend Growth Fund (Class R6)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>42</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R167.htm</HtmlFileName>
      <LongName>020165 - Disclosure - Risk/Return Detail Data {Elements} - Class R6 Shares (NRDGX) - Neuberger Berman Dividend Growth Fund (Class R6)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DisclosureRiskReturnDetailDataElementsClassR6SharesNRDGXNeubergerBermanDividendGrowthFundClassR6</Role>
      <ShortName>Risk/Return Detail Data- Class R6 Shares (NRDGX) - Neuberger Berman Dividend Growth Fund (Class R6)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>43</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R168.htm</HtmlFileName>
      <LongName>020166 - Document - Risk/Return Summary {Unlabeled} - Class R6 Shares (NREMX) - Neuberger Berman Emerging Markets Equity Fund (Class R6)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DocumentRiskReturnSummaryUnlabeledClassR6SharesNREMXNeubergerBermanEmergingMarketsEquityFundClassR6</Role>
      <ShortName>Risk/Return Summary- Class R6 Shares (NREMX) - Neuberger Berman Emerging Markets Equity Fund (Class R6)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>44</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R174.htm</HtmlFileName>
      <LongName>020172 - Disclosure - Risk/Return Detail Data {Elements} - Class R6 Shares (NREMX) - Neuberger Berman Emerging Markets Equity Fund (Class R6)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DisclosureRiskReturnDetailDataElementsClassR6SharesNREMXNeubergerBermanEmergingMarketsEquityFundClassR6</Role>
      <ShortName>Risk/Return Detail Data- Class R6 Shares (NREMX) - Neuberger Berman Emerging Markets Equity Fund (Class R6)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>45</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R175.htm</HtmlFileName>
      <LongName>020173 - Document - Risk/Return Summary {Unlabeled} - Class R6 Shares (NRGSX) - Neuberger Berman Genesis Fund (Class R6)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DocumentRiskReturnSummaryUnlabeledClassR6SharesNRGSXNeubergerBermanGenesisFundClassR6</Role>
      <ShortName>Risk/Return Summary- Class R6 Shares (NRGSX) - Neuberger Berman Genesis Fund (Class R6)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>46</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R181.htm</HtmlFileName>
      <LongName>020179 - Disclosure - Risk/Return Detail Data {Elements} - Class R6 Shares (NRGSX) - Neuberger Berman Genesis Fund (Class R6)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DisclosureRiskReturnDetailDataElementsClassR6SharesNRGSXNeubergerBermanGenesisFundClassR6</Role>
      <ShortName>Risk/Return Detail Data- Class R6 Shares (NRGSX) - Neuberger Berman Genesis Fund (Class R6)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>47</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R182.htm</HtmlFileName>
      <LongName>020180 - Document - Risk/Return Summary {Unlabeled} - Class R6 Shares (NGRDX) - Neuberger Berman Guardian Fund (Class R6)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DocumentRiskReturnSummaryUnlabeledClassR6SharesNGRDXNeubergerBermanGuardianFundClassR6</Role>
      <ShortName>Risk/Return Summary- Class R6 Shares (NGRDX) - Neuberger Berman Guardian Fund (Class R6)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>48</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R188.htm</HtmlFileName>
      <LongName>020186 - Disclosure - Risk/Return Detail Data {Elements} - Class R6 Shares (NGRDX) - Neuberger Berman Guardian Fund (Class R6)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DisclosureRiskReturnDetailDataElementsClassR6SharesNGRDXNeubergerBermanGuardianFundClassR6</Role>
      <ShortName>Risk/Return Detail Data- Class R6 Shares (NGRDX) - Neuberger Berman Guardian Fund (Class R6)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>49</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R189.htm</HtmlFileName>
      <LongName>020187 - Document - Risk/Return Summary {Unlabeled} - Class R6 Shares (NRIQX) - Neuberger Berman International Equity Fund (Class R6)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DocumentRiskReturnSummaryUnlabeledClassR6SharesNRIQXNeubergerBermanInternationalEquityFundClassR6</Role>
      <ShortName>Risk/Return Summary- Class R6 Shares (NRIQX) - Neuberger Berman International Equity Fund (Class R6)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>50</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R195.htm</HtmlFileName>
      <LongName>020193 - Disclosure - Risk/Return Detail Data {Elements} - Class R6 Shares (NRIQX) - Neuberger Berman International Equity Fund (Class R6)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DisclosureRiskReturnDetailDataElementsClassR6SharesNRIQXNeubergerBermanInternationalEquityFundClassR6</Role>
      <ShortName>Risk/Return Detail Data- Class R6 Shares (NRIQX) - Neuberger Berman International Equity Fund (Class R6)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>51</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R196.htm</HtmlFileName>
      <LongName>020194 - Document - Risk/Return Summary {Unlabeled} - Class R6 Shares (NRILX) - Neuberger Berman International Select Fund (Class R6)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DocumentRiskReturnSummaryUnlabeledClassR6SharesNRILXNeubergerBermanInternationalSelectFundClassR6</Role>
      <ShortName>Risk/Return Summary- Class R6 Shares (NRILX) - Neuberger Berman International Select Fund (Class R6)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>52</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R202.htm</HtmlFileName>
      <LongName>020200 - Disclosure - Risk/Return Detail Data {Elements} - Class R6 Shares (NRILX) - Neuberger Berman International Select Fund (Class R6)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DisclosureRiskReturnDetailDataElementsClassR6SharesNRILXNeubergerBermanInternationalSelectFundClassR6</Role>
      <ShortName>Risk/Return Detail Data- Class R6 Shares (NRILX) - Neuberger Berman International Select Fund (Class R6)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>53</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R203.htm</HtmlFileName>
      <LongName>020201 - Document - Risk/Return Summary {Unlabeled} - Class R6 (NIORX) - Neuberger Berman International Small Cap Fund (Class R6)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DocumentRiskReturnSummaryUnlabeledClassR6NIORXNeubergerBermanInternationalSmallCapFundClassR6</Role>
      <ShortName>Risk/Return Summary- Class R6 (NIORX) - Neuberger Berman International Small Cap Fund (Class R6)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>54</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R209.htm</HtmlFileName>
      <LongName>020207 - Disclosure - Risk/Return Detail Data {Elements} - Class R6 (NIORX) - Neuberger Berman International Small Cap Fund (Class R6)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DisclosureRiskReturnDetailDataElementsClassR6NIORXNeubergerBermanInternationalSmallCapFundClassR6</Role>
      <ShortName>Risk/Return Detail Data- Class R6 (NIORX) - Neuberger Berman International Small Cap Fund (Class R6)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>55</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R210.htm</HtmlFileName>
      <LongName>020208 - Document - Risk/Return Summary {Unlabeled} - Class R6 Shares (NRINX) - Neuberger Berman Intrinsic Value Fund (Class R6)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DocumentRiskReturnSummaryUnlabeledClassR6SharesNRINXNeubergerBermanIntrinsicValueFundClassR6</Role>
      <ShortName>Risk/Return Summary- Class R6 Shares (NRINX) - Neuberger Berman Intrinsic Value Fund (Class R6)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>56</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R216.htm</HtmlFileName>
      <LongName>020214 - Disclosure - Risk/Return Detail Data {Elements} - Class R6 Shares (NRINX) - Neuberger Berman Intrinsic Value Fund (Class R6)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DisclosureRiskReturnDetailDataElementsClassR6SharesNRINXNeubergerBermanIntrinsicValueFundClassR6</Role>
      <ShortName>Risk/Return Detail Data- Class R6 Shares (NRINX) - Neuberger Berman Intrinsic Value Fund (Class R6)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>57</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R217.htm</HtmlFileName>
      <LongName>020215 - Document - Risk/Return Summary {Unlabeled} - Class R6 Shares (NRLCX) - Neuberger Berman Large Cap Value Fund (Class R6)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DocumentRiskReturnSummaryUnlabeledClassR6SharesNRLCXNeubergerBermanLargeCapValueFundClassR6</Role>
      <ShortName>Risk/Return Summary- Class R6 Shares (NRLCX) - Neuberger Berman Large Cap Value Fund (Class R6)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>58</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R223.htm</HtmlFileName>
      <LongName>020221 - Disclosure - Risk/Return Detail Data {Elements} - Class R6 Shares (NRLCX) - Neuberger Berman Large Cap Value Fund (Class R6)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DisclosureRiskReturnDetailDataElementsClassR6SharesNRLCXNeubergerBermanLargeCapValueFundClassR6</Role>
      <ShortName>Risk/Return Detail Data- Class R6 Shares (NRLCX) - Neuberger Berman Large Cap Value Fund (Class R6)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>59</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R224.htm</HtmlFileName>
      <LongName>020222 - Document - Risk/Return Summary {Unlabeled} - Class R6 Shares (NRMGX) - Neuberger Berman Mid Cap Growth Fund (Class R6)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DocumentRiskReturnSummaryUnlabeledClassR6SharesNRMGXNeubergerBermanMidCapGrowthFundClassR6</Role>
      <ShortName>Risk/Return Summary- Class R6 Shares (NRMGX) - Neuberger Berman Mid Cap Growth Fund (Class R6)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>60</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R230.htm</HtmlFileName>
      <LongName>020228 - Disclosure - Risk/Return Detail Data {Elements} - Class R6 Shares (NRMGX) - Neuberger Berman Mid Cap Growth Fund (Class R6)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DisclosureRiskReturnDetailDataElementsClassR6SharesNRMGXNeubergerBermanMidCapGrowthFundClassR6</Role>
      <ShortName>Risk/Return Detail Data- Class R6 Shares (NRMGX) - Neuberger Berman Mid Cap Growth Fund (Class R6)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>61</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R231.htm</HtmlFileName>
      <LongName>020229 - Document - Risk/Return Summary {Unlabeled} - Class R6 Shares (NBMRX) - Neuberger Berman Mid Cap Intrinsic Value Fund (Class R6)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DocumentRiskReturnSummaryUnlabeledClassR6SharesNBMRXNeubergerBermanMidCapIntrinsicValueFundClassR6</Role>
      <ShortName>Risk/Return Summary- Class R6 Shares (NBMRX) - Neuberger Berman Mid Cap Intrinsic Value Fund (Class R6)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>62</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R237.htm</HtmlFileName>
      <LongName>020235 - Disclosure - Risk/Return Detail Data {Elements} - Class R6 Shares (NBMRX) - Neuberger Berman Mid Cap Intrinsic Value Fund (Class R6)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DisclosureRiskReturnDetailDataElementsClassR6SharesNBMRXNeubergerBermanMidCapIntrinsicValueFundClassR6</Role>
      <ShortName>Risk/Return Detail Data- Class R6 Shares (NBMRX) - Neuberger Berman Mid Cap Intrinsic Value Fund (Class R6)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>63</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R238.htm</HtmlFileName>
      <LongName>020236 - Document - Risk/Return Summary {Unlabeled} - Class R6 Shares (NRREX) - Neuberger Berman Real Estate Fund (Class R6)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DocumentRiskReturnSummaryUnlabeledClassR6SharesNRREXNeubergerBermanRealEstateFundClassR6</Role>
      <ShortName>Risk/Return Summary- Class R6 Shares (NRREX) - Neuberger Berman Real Estate Fund (Class R6)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>64</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R244.htm</HtmlFileName>
      <LongName>020242 - Disclosure - Risk/Return Detail Data {Elements} - Class R6 Shares (NRREX) - Neuberger Berman Real Estate Fund (Class R6)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DisclosureRiskReturnDetailDataElementsClassR6SharesNRREXNeubergerBermanRealEstateFundClassR6</Role>
      <ShortName>Risk/Return Detail Data- Class R6 Shares (NRREX) - Neuberger Berman Real Estate Fund (Class R6)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>65</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R245.htm</HtmlFileName>
      <LongName>020243 - Document - Risk/Return Summary {Unlabeled} - Class R6 Shares (NSRSX) - Neuberger Berman Small Cap Growth Fund (Class R6)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DocumentRiskReturnSummaryUnlabeledClassR6SharesNSRSXNeubergerBermanSmallCapGrowthFundClassR6</Role>
      <ShortName>Risk/Return Summary- Class R6 Shares (NSRSX) - Neuberger Berman Small Cap Growth Fund (Class R6)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>66</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R251.htm</HtmlFileName>
      <LongName>020249 - Disclosure - Risk/Return Detail Data {Elements} - Class R6 Shares (NSRSX) - Neuberger Berman Small Cap Growth Fund (Class R6)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DisclosureRiskReturnDetailDataElementsClassR6SharesNSRSXNeubergerBermanSmallCapGrowthFundClassR6</Role>
      <ShortName>Risk/Return Detail Data- Class R6 Shares (NSRSX) - Neuberger Berman Small Cap Growth Fund (Class R6)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>67</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R252.htm</HtmlFileName>
      <LongName>020250 - Document - Risk/Return Summary {Unlabeled} - Class R6 Shares (NRSRX) - Neuberger Berman Sustainable Equity Fund (Class R6)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DocumentRiskReturnSummaryUnlabeledClassR6SharesNRSRXNeubergerBermanSustainableEquityFundClassR6</Role>
      <ShortName>Risk/Return Summary- Class R6 Shares (NRSRX) - Neuberger Berman Sustainable Equity Fund (Class R6)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>68</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R258.htm</HtmlFileName>
      <LongName>020256 - Disclosure - Risk/Return Detail Data {Elements} - Class R6 Shares (NRSRX) - Neuberger Berman Sustainable Equity Fund (Class R6)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DisclosureRiskReturnDetailDataElementsClassR6SharesNRSRXNeubergerBermanSustainableEquityFundClassR6</Role>
      <ShortName>Risk/Return Detail Data- Class R6 Shares (NRSRX) - Neuberger Berman Sustainable Equity Fund (Class R6)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>69</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R259.htm</HtmlFileName>
      <LongName>020257 - Document - Risk/Return Summary {Unlabeled} - Class R3 Shares (NEMRX) - Neuberger Berman Emerging Markets Equity Fund (Class R3)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DocumentRiskReturnSummaryUnlabeledClassR3SharesNEMRXNeubergerBermanEmergingMarketsEquityFundClassR3</Role>
      <ShortName>Risk/Return Summary- Class R3 Shares (NEMRX) - Neuberger Berman Emerging Markets Equity Fund (Class R3)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>70</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R265.htm</HtmlFileName>
      <LongName>020263 - Disclosure - Risk/Return Detail Data {Elements} - Class R3 Shares (NEMRX) - Neuberger Berman Emerging Markets Equity Fund (Class R3)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DisclosureRiskReturnDetailDataElementsClassR3SharesNEMRXNeubergerBermanEmergingMarketsEquityFundClassR3</Role>
      <ShortName>Risk/Return Detail Data- Class R3 Shares (NEMRX) - Neuberger Berman Emerging Markets Equity Fund (Class R3)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>71</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R266.htm</HtmlFileName>
      <LongName>020264 - Document - Risk/Return Summary {Unlabeled} - Class R3 Shares (NBHRX) - Neuberger Berman Equity Income Fund (Class R3)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DocumentRiskReturnSummaryUnlabeledClassR3SharesNBHRXNeubergerBermanEquityIncomeFundClassR3</Role>
      <ShortName>Risk/Return Summary- Class R3 Shares (NBHRX) - Neuberger Berman Equity Income Fund (Class R3)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>72</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R272.htm</HtmlFileName>
      <LongName>020270 - Disclosure - Risk/Return Detail Data {Elements} - Class R3 Shares (NBHRX) - Neuberger Berman Equity Income Fund (Class R3)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DisclosureRiskReturnDetailDataElementsClassR3SharesNBHRXNeubergerBermanEquityIncomeFundClassR3</Role>
      <ShortName>Risk/Return Detail Data- Class R3 Shares (NBHRX) - Neuberger Berman Equity Income Fund (Class R3)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>73</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R273.htm</HtmlFileName>
      <LongName>020271 - Document - Risk/Return Summary {Unlabeled} - Class R3 Shares (NGDRX) - Neuberger Berman Guardian Fund (Class R3)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DocumentRiskReturnSummaryUnlabeledClassR3SharesNGDRXNeubergerBermanGuardianFundClassR3</Role>
      <ShortName>Risk/Return Summary- Class R3 Shares (NGDRX) - Neuberger Berman Guardian Fund (Class R3)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>74</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R279.htm</HtmlFileName>
      <LongName>020277 - Disclosure - Risk/Return Detail Data {Elements} - Class R3 Shares (NGDRX) - Neuberger Berman Guardian Fund (Class R3)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DisclosureRiskReturnDetailDataElementsClassR3SharesNGDRXNeubergerBermanGuardianFundClassR3</Role>
      <ShortName>Risk/Return Detail Data- Class R3 Shares (NGDRX) - Neuberger Berman Guardian Fund (Class R3)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>75</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R280.htm</HtmlFileName>
      <LongName>020278 - Document - Risk/Return Summary {Unlabeled} - Class R3 Shares (NBNRX) - Neuberger Berman International Select Fund (Class R3)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DocumentRiskReturnSummaryUnlabeledClassR3SharesNBNRXNeubergerBermanInternationalSelectFundClassR3</Role>
      <ShortName>Risk/Return Summary- Class R3 Shares (NBNRX) - Neuberger Berman International Select Fund (Class R3)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>76</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R286.htm</HtmlFileName>
      <LongName>020284 - Disclosure - Risk/Return Detail Data {Elements} - Class R3 Shares (NBNRX) - Neuberger Berman International Select Fund (Class R3)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DisclosureRiskReturnDetailDataElementsClassR3SharesNBNRXNeubergerBermanInternationalSelectFundClassR3</Role>
      <ShortName>Risk/Return Detail Data- Class R3 Shares (NBNRX) - Neuberger Berman International Select Fund (Class R3)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>77</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R287.htm</HtmlFileName>
      <LongName>020285 - Document - Risk/Return Summary {Unlabeled} - Class R3 Shares (NPNRX) - Neuberger Berman Large Cap Value Fund (Class R3)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DocumentRiskReturnSummaryUnlabeledClassR3SharesNPNRXNeubergerBermanLargeCapValueFundClassR3</Role>
      <ShortName>Risk/Return Summary- Class R3 Shares (NPNRX) - Neuberger Berman Large Cap Value Fund (Class R3)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>78</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R293.htm</HtmlFileName>
      <LongName>020291 - Disclosure - Risk/Return Detail Data {Elements} - Class R3 Shares (NPNRX) - Neuberger Berman Large Cap Value Fund (Class R3)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DisclosureRiskReturnDetailDataElementsClassR3SharesNPNRXNeubergerBermanLargeCapValueFundClassR3</Role>
      <ShortName>Risk/Return Detail Data- Class R3 Shares (NPNRX) - Neuberger Berman Large Cap Value Fund (Class R3)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>79</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R294.htm</HtmlFileName>
      <LongName>020292 - Document - Risk/Return Summary {Unlabeled} - Class R3 Shares (NMGRX) - Neuberger Berman Mid Cap Growth Fund (Class R3)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DocumentRiskReturnSummaryUnlabeledClassR3SharesNMGRXNeubergerBermanMidCapGrowthFundClassR3</Role>
      <ShortName>Risk/Return Summary- Class R3 Shares (NMGRX) - Neuberger Berman Mid Cap Growth Fund (Class R3)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>80</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R300.htm</HtmlFileName>
      <LongName>020298 - Disclosure - Risk/Return Detail Data {Elements} - Class R3 Shares (NMGRX) - Neuberger Berman Mid Cap Growth Fund (Class R3)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DisclosureRiskReturnDetailDataElementsClassR3SharesNMGRXNeubergerBermanMidCapGrowthFundClassR3</Role>
      <ShortName>Risk/Return Detail Data- Class R3 Shares (NMGRX) - Neuberger Berman Mid Cap Growth Fund (Class R3)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>81</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R301.htm</HtmlFileName>
      <LongName>020299 - Document - Risk/Return Summary {Unlabeled} - Class R3 Shares (NBRRX) - Neuberger Berman Mid Cap Intrinsic Value Fund (Class R3)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DocumentRiskReturnSummaryUnlabeledClassR3SharesNBRRXNeubergerBermanMidCapIntrinsicValueFundClassR3</Role>
      <ShortName>Risk/Return Summary- Class R3 Shares (NBRRX) - Neuberger Berman Mid Cap Intrinsic Value Fund (Class R3)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>82</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R307.htm</HtmlFileName>
      <LongName>020305 - Disclosure - Risk/Return Detail Data {Elements} - Class R3 Shares (NBRRX) - Neuberger Berman Mid Cap Intrinsic Value Fund (Class R3)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DisclosureRiskReturnDetailDataElementsClassR3SharesNBRRXNeubergerBermanMidCapIntrinsicValueFundClassR3</Role>
      <ShortName>Risk/Return Detail Data- Class R3 Shares (NBRRX) - Neuberger Berman Mid Cap Intrinsic Value Fund (Class R3)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>83</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R308.htm</HtmlFileName>
      <LongName>020306 - Document - Risk/Return Summary {Unlabeled} - Class R3 Shares (NRERX) - Neuberger Berman Real Estate Fund (Class R3)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DocumentRiskReturnSummaryUnlabeledClassR3SharesNRERXNeubergerBermanRealEstateFundClassR3</Role>
      <ShortName>Risk/Return Summary- Class R3 Shares (NRERX) - Neuberger Berman Real Estate Fund (Class R3)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>84</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R314.htm</HtmlFileName>
      <LongName>020312 - Disclosure - Risk/Return Detail Data {Elements} - Class R3 Shares (NRERX) - Neuberger Berman Real Estate Fund (Class R3)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DisclosureRiskReturnDetailDataElementsClassR3SharesNRERXNeubergerBermanRealEstateFundClassR3</Role>
      <ShortName>Risk/Return Detail Data- Class R3 Shares (NRERX) - Neuberger Berman Real Estate Fund (Class R3)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>85</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R315.htm</HtmlFileName>
      <LongName>020313 - Document - Risk/Return Summary {Unlabeled} - Class R3 Shares (NSNRX) - Neuberger Berman Small Cap Growth Fund (Class R3)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DocumentRiskReturnSummaryUnlabeledClassR3SharesNSNRXNeubergerBermanSmallCapGrowthFundClassR3</Role>
      <ShortName>Risk/Return Summary- Class R3 Shares (NSNRX) - Neuberger Berman Small Cap Growth Fund (Class R3)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>86</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R321.htm</HtmlFileName>
      <LongName>020319 - Disclosure - Risk/Return Detail Data {Elements} - Class R3 Shares (NSNRX) - Neuberger Berman Small Cap Growth Fund (Class R3)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DisclosureRiskReturnDetailDataElementsClassR3SharesNSNRXNeubergerBermanSmallCapGrowthFundClassR3</Role>
      <ShortName>Risk/Return Detail Data- Class R3 Shares (NSNRX) - Neuberger Berman Small Cap Growth Fund (Class R3)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>87</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R322.htm</HtmlFileName>
      <LongName>020320 - Document - Risk/Return Summary {Unlabeled} - Class R3 Shares (NRARX) - Neuberger Berman Sustainable Equity Fund (Class R3)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DocumentRiskReturnSummaryUnlabeledClassR3SharesNRARXNeubergerBermanSustainableEquityFundClassR3</Role>
      <ShortName>Risk/Return Summary- Class R3 Shares (NRARX) - Neuberger Berman Sustainable Equity Fund (Class R3)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>88</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R328.htm</HtmlFileName>
      <LongName>020326 - Disclosure - Risk/Return Detail Data {Elements} - Class R3 Shares (NRARX) - Neuberger Berman Sustainable Equity Fund (Class R3)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nb.com/20210203/role/DisclosureRiskReturnDetailDataElementsClassR3SharesNRARXNeubergerBermanSustainableEquityFundClassR3</Role>
      <ShortName>Risk/Return Detail Data- Class R3 Shares (NRARX) - Neuberger Berman Sustainable Equity Fund (Class R3)</ShortName>
      <MenuCategory></MenuCategory>
      <Position>89</Position>
    </Report>
    <Report instance="nbef-20210203.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R329.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>90</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="497" original="nbef-20210203.htm">nbef-20210203.htm</File>
    <File>nbef-20210203.xsd</File>
    <File>nbef-20210203_cal.xml</File>
    <File>nbef-20210203_def.xml</File>
    <File>nbef-20210203_lab.xml</File>
    <File>nbef-20210203_pre.xml</File>
  </InputFiles>
  <SupplementalFiles>
    <File>divgrowth_inst.jpg</File>
    <File>divgrowth_r6.jpg</File>
    <File>eme_inst.jpg</File>
    <File>eme_r3.jpg</File>
    <File>eme_r6.jpg</File>
    <File>equityincome_inst.jpg</File>
    <File>equityincome_r3.jpg</File>
    <File>focus_inst.jpg</File>
    <File>genesis_inst.jpg</File>
    <File>genesis_r6.jpg</File>
    <File>globalre_inst.jpg</File>
    <File>greaterchina_inst.jpg</File>
    <File>guardian_inst.jpg</File>
    <File>guardian_r3.jpg</File>
    <File>guardian_r6.jpg</File>
    <File>img0e2464212.gif</File>
    <File>img1468c7a91.gif</File>
    <File>intlc_inst.jpg</File>
    <File>intlequity_inst.jpg</File>
    <File>intlequity_r6.jpg</File>
    <File>intlselect_inst.jpg</File>
    <File>intlselect_r3.jpg</File>
    <File>intlselect_r6.jpg</File>
    <File>intlsmallcap_inst.jpg</File>
    <File>intlsmallcap_r6.jpg</File>
    <File>intrinsicvalue_inst.jpg</File>
    <File>intrinsicvalue_r6.jpg</File>
    <File>lcv_inst.jpg</File>
    <File>lcv_r3.jpg</File>
    <File>lcv_r6.jpg</File>
    <File>logo_black.gif</File>
    <File>mcg_inst.jpg</File>
    <File>mcg_r3.jpg</File>
    <File>mcg_r6.jpg</File>
    <File>mciv_inst.jpg</File>
    <File>mciv_r3.jpg</File>
    <File>mciv_r6.jpg</File>
    <File>multicapopp_inst.jpg</File>
    <File>realestate_inst.jpg</File>
    <File>realestate_r3.jpg</File>
    <File>realestate_r6.jpg</File>
    <File>scg_inst.jpg</File>
    <File>scg_r3.jpg</File>
    <File>scg_r6.jpg</File>
    <File>suseq_inst.jpg</File>
    <File>suseq_r3.jpg</File>
    <File>suseq_r6.jpg</File>
    <File>BarChart1.png</File>
    <File>BarChart2.png</File>
    <File>BarChart3.png</File>
    <File>BarChart4.png</File>
    <File>BarChart5.png</File>
    <File>BarChart6.png</File>
    <File>BarChart7.png</File>
    <File>BarChart8.png</File>
    <File>BarChart9.png</File>
    <File>BarChart10.png</File>
    <File>BarChart11.png</File>
    <File>BarChart12.png</File>
    <File>BarChart13.png</File>
    <File>BarChart14.png</File>
    <File>BarChart15.png</File>
    <File>BarChart16.png</File>
    <File>BarChart17.png</File>
    <File>BarChart18.png</File>
    <File>BarChart19.png</File>
    <File>BarChart20.png</File>
    <File>BarChart21.png</File>
    <File>BarChart22.png</File>
    <File>BarChart23.png</File>
    <File>BarChart24.png</File>
    <File>BarChart25.png</File>
    <File>BarChart26.png</File>
    <File>BarChart27.png</File>
    <File>BarChart28.png</File>
    <File>BarChart29.png</File>
    <File>BarChart30.png</File>
    <File>BarChart31.png</File>
    <File>BarChart32.png</File>
    <File>BarChart33.png</File>
    <File>BarChart34.png</File>
    <File>BarChart35.png</File>
    <File>BarChart36.png</File>
    <File>BarChart37.png</File>
    <File>BarChart38.png</File>
    <File>BarChart39.png</File>
    <File>BarChart40.png</File>
    <File>BarChart41.png</File>
    <File>BarChart42.png</File>
    <File>BarChart43.png</File>
    <File>BarChart44.png</File>
  </SupplementalFiles>
  <BaseTaxonomies>
    <BaseTaxonomy>http://xbrl.sec.gov/dei/2019-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://xbrl.sec.gov/rr/2018-01-31</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
