<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.25.0.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>260</ContextCount>
  <ElementCount>89</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>115</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>2</UnitCount>
  <MyReports>
    <Report instance="d815285d485bpos.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>000000 - Document - Document and Entity Information {Elements}</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.leggmason.com/role/DocumentDocumentandEntityInformationElements000000</Role>
      <ShortName>Document and Entity Information</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="d815285d485bpos.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>000021 - Disclosure - Risk/Return Detail Data {Elements} - ClearBridge Appreciation Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.leggmason.com/role/DisclosureRiskReturnDetailDataElementsClearBridgeAppreciationFund000021</Role>
      <ShortName>Risk/Return Detail Data- ClearBridge Appreciation Fund</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="d815285d485bpos.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>000041 - Disclosure - Risk/Return Detail Data {Elements} - ClearBridge International Value Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.leggmason.com/role/DisclosureRiskReturnDetailDataElementsClearBridgeInternationalValueFund000041</Role>
      <ShortName>Risk/Return Detail Data- ClearBridge International Value Fund</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="d815285d485bpos.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>000061 - Disclosure - Risk/Return Detail Data {Elements} - ClearBridge Large Cap Value Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.leggmason.com/role/DisclosureRiskReturnDetailDataElementsClearBridgeLargeCapValueFund000061</Role>
      <ShortName>Risk/Return Detail Data- ClearBridge Large Cap Value Fund</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="d815285d485bpos.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>000081 - Disclosure - Risk/Return Detail Data {Elements} - ClearBridge Mid Cap Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.leggmason.com/role/DisclosureRiskReturnDetailDataElementsClearBridgeMidCapFund000081</Role>
      <ShortName>Risk/Return Detail Data- ClearBridge Mid Cap Fund</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="d815285d485bpos.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>000101 - Disclosure - Risk/Return Detail Data {Elements} - ClearBridge Mid Cap Growth Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.leggmason.com/role/DisclosureRiskReturnDetailDataElementsClearBridgeMidCapGrowthFund000101</Role>
      <ShortName>Risk/Return Detail Data- ClearBridge Mid Cap Growth Fund</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="d815285d485bpos.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>000121 - Disclosure - Risk/Return Detail Data {Elements} - ClearBridge Select Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.leggmason.com/role/DisclosureRiskReturnDetailDataElementsClearBridgeSelectFund000121</Role>
      <ShortName>Risk/Return Detail Data- ClearBridge Select Fund</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="d815285d485bpos.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>000141 - Disclosure - Risk/Return Detail Data {Elements} - ClearBridge Small Cap Growth Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.leggmason.com/role/DisclosureRiskReturnDetailDataElementsClearBridgeSmallCapGrowthFund000141</Role>
      <ShortName>Risk/Return Detail Data- ClearBridge Small Cap Growth Fund</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="d815285d485bpos.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>000161 - Disclosure - Risk/Return Detail Data {Elements} - ClearBridge Sustainability Leaders Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.leggmason.com/role/DisclosureRiskReturnDetailDataElementsClearBridgeSustainabilityLeadersFund000161</Role>
      <ShortName>Risk/Return Detail Data- ClearBridge Sustainability Leaders Fund</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="d815285d485bpos.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>000181 - Disclosure - Risk/Return Detail Data {Elements} - ClearBridge Tactical Dividend Income Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.leggmason.com/role/DisclosureRiskReturnDetailDataElementsClearBridgeTacticalDividendIncomeFund000181</Role>
      <ShortName>Risk/Return Detail Data- ClearBridge Tactical Dividend Income Fund</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="d815285d485bpos.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>000201 - Disclosure - Risk/Return Detail Data {Elements} - Franklin Global Equity Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.leggmason.com/role/DisclosureRiskReturnDetailDataElementsFranklinGlobalEquityFund000201</Role>
      <ShortName>Risk/Return Detail Data- Franklin Global Equity Fund</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>11</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="d815285d485bpos.htm">d815285d485bpos.htm</File>
    <File>lmpet-20250221.xsd</File>
    <File>lmpet-20250221_cal.xml</File>
    <File>lmpet-20250221_def.xml</File>
    <File>lmpet-20250221_lab.xml</File>
    <File>lmpet-20250221_pre.xml</File>
  </InputFiles>
  <SupplementalFiles>
    <File>g815285clearbridgelogo.jpg</File>
    <File>g815285dsp006.jpg</File>
    <File>g815285g03p97.jpg</File>
    <File>g815285g1clearbridgelogo.jpg</File>
    <File>g815285g1dsp7.jpg</File>
    <File>g815285g2clearbridgelogo.jpg</File>
    <File>g815285g2dsp6.jpg</File>
    <File>g815285g2g03p97.jpg</File>
    <File>g815285g2g57q58.jpg</File>
    <File>g815285g3clearbridgelogo.jpg</File>
    <File>g815285g3dsp06.jpg</File>
    <File>g815285g3g03p97.jpg</File>
    <File>g815285g3g57q58.jpg</File>
    <File>g815285g4clearbridgelogo.jpg</File>
    <File>g815285g4g03p97.jpg</File>
    <File>g815285g4g07g07.jpg</File>
    <File>g815285g4g57q58.jpg</File>
    <File>g815285g57q58.jpg</File>
    <File>g815285g5clearbridgelogo.jpg</File>
    <File>g815285g5dsp008.jpg</File>
    <File>g815285g5g03p97.jpg</File>
    <File>g815285g5g57q58.jpg</File>
    <File>g815285g6clearbridgelogo.jpg</File>
    <File>g815285g6g03p97.jpg</File>
    <File>g815285g6g06g06.jpg</File>
    <File>g815285g6g57q58.jpg</File>
    <File>g815285g7clearbridgelogo.jpg</File>
    <File>g815285g7g03p97.jpg</File>
    <File>g815285g7g57q58.jpg</File>
    <File>g815285g7page0007.jpg</File>
    <File>g815285g8clearbridgelogo.jpg</File>
    <File>g815285g8g00g08.jpg</File>
    <File>g815285g8g03p97.jpg</File>
    <File>g815285g8g57q58.jpg</File>
    <File>g815285g9g03p97.jpg</File>
    <File>g815285g9g07k07.jpg</File>
    <File>g815285g9g83h05.jpg</File>
  </SupplementalFiles>
  <BaseTaxonomies>
    <BaseTaxonomy items="8">http://xbrl.sec.gov/dei/2023</BaseTaxonomy>
    <BaseTaxonomy items="1917">http://xbrl.sec.gov/rr/2023</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
