<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.23.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>4</ContextCount>
  <ElementCount>40</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>3</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>2</UnitCount>
  <MyReports>
    <Report instance="d434904d485bpos.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.1290funds.com/role/DocumentDocumentandEntityInformationElements</Role>
      <ShortName>Document and Entity Information</ShortName>
      <MenuCategory></MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="d434904d485bpos.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>000019 - Disclosure - Risk/Return Detail Data {Elements} - EQ Intermediate Corporate Bond Portfolio</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.1290funds.com/role/DisclosureRiskReturnDetailDataElementsEQIntermediateCorporateBondPortfolio</Role>
      <ShortName>Risk/Return Detail Data- EQ Intermediate Corporate Bond Portfolio</ShortName>
      <MenuCategory></MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="d434904d485bpos.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.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>3</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/2021 used in 1 facts was deprecated in rr/2023 as of 2023-01-31 and should not be used. d434904d485bpos.htm 185</Log>
    <Log type="Warning">[dq-0542-Deprecated-Concept] Concept RiskNotInsuredDepositoryInstitution in rr/2021 used in 1 facts was deprecated in rr/2023 as of 2023-01-31 and should not be used. d434904d485bpos.htm 185</Log>
    <Log type="Warning">[dq-0542-Deprecated-Concept] Concept RiskLoseMoney in rr/2021 used in 1 facts was deprecated in rr/2023 as of 2023-01-31 and should not be used. d434904d485bpos.htm 185</Log>
    <Log type="Warning">[ix-0514-Hidden-Fact-Eligible-For-Transform] WARN: 1 fact(s) appearing in ix:hidden were eligible for transformation: rr:ProspectusDate -  d434904d485bpos.htm 9</Log>
    <Log type="Warning">[ix-0514-Hidden-Fact-Not-Referenced] WARN: 1 fact(s) appearing in ix:hidden were not referenced by any -sec-ix-hidden style property: rr:ShareholderFeeOther -  d434904d485bpos.htm 9</Log>
  </Logs>
  <InputFiles>
    <File doctype="485BPOS" original="d434904d485bpos.htm">d434904d485bpos.htm</File>
    <File>d434904dex99d1vii.htm</File>
    <File>d434904dex99d6vi.htm</File>
    <File>d434904dex99e1vi.htm</File>
    <File>d434904dex99e2vi.htm</File>
    <File>d434904dex99g1xlii.htm</File>
    <File>d434904dex99h10ii.htm</File>
    <File>d434904dex99h11i.htm</File>
    <File>d434904dex99h11ii.htm</File>
    <File>d434904dex99h12ii.htm</File>
    <File>d434904dex99h13ii.htm</File>
    <File>d434904dex99h14ii.htm</File>
    <File>d434904dex99h15ii.htm</File>
    <File>d434904dex99h16ii.htm</File>
    <File>d434904dex99h17ii.htm</File>
    <File>d434904dex99h18ii.htm</File>
    <File>d434904dex99h19ii.htm</File>
    <File>d434904dex99h1ii.htm</File>
    <File>d434904dex99h20ii.htm</File>
    <File>d434904dex99h21i.htm</File>
    <File>d434904dex99h2ii.htm</File>
    <File>d434904dex99h4xix.htm</File>
    <File>d434904dex99h7xx.htm</File>
    <File>d434904dex99h8iv.htm</File>
    <File>d434904dex99h9ii.htm</File>
    <File>d434904dex99i1.htm</File>
    <File>d434904dex99m1.htm</File>
    <File>d434904dex99p2.htm</File>
    <File>d434904dex99poa.htm</File>
    <File>eqat-20230329.xsd</File>
    <File>eqat-20230329_cal.xml</File>
    <File>eqat-20230329_def.xml</File>
    <File>eqat-20230329_lab.xml</File>
    <File>eqat-20230329_pre.xml</File>
  </InputFiles>
  <SupplementalFiles>
    <File>g376385g09a01.jpg</File>
    <File>g376385g46s12.jpg</File>
    <File>g376385g77m14.jpg</File>
    <File>g376385g88o20.jpg</File>
  </SupplementalFiles>
  <BaseTaxonomies>
    <BaseTaxonomy items="8">http://xbrl.sec.gov/dei/2021</BaseTaxonomy>
    <BaseTaxonomy items="41">http://xbrl.sec.gov/rr/2021</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
