<?xml version="1.0" encoding="utf-8"?>
<xbrl
  xmlns="http://www.xbrl.org/2003/instance"
  xmlns:dei="http://xbrl.sec.gov/dei/2025"
  xmlns:link="http://www.xbrl.org/2003/linkbase"
  xmlns:nyli="http://newyorklifeinvestments.com/20260626"
  xmlns:oef="http://xbrl.sec.gov/oef/2025"
  xmlns:xbrldi="http://xbrl.org/2006/xbrldi"
  xmlns:xlink="http://www.w3.org/1999/xlink">
    <link:schemaRef xlink:href="nyli-20260626.xsd" xlink:type="simple"/>
    <context id="AsOf2026-06-26">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001426439</identifier>
        </entity>
        <period>
            <startDate>2026-06-26</startDate>
            <endDate>2026-06-26</endDate>
        </period>
    </context>
    <context id="From2026-06-262026-06-26_custom_S000079855Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001426439</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">nyli:S000079855Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-06-26</startDate>
            <endDate>2026-06-26</endDate>
        </period>
    </context>
    <dei:AmendmentFlag contextRef="AsOf2026-06-26" id="Fact000003">false</dei:AmendmentFlag>
    <dei:DocumentType contextRef="AsOf2026-06-26" id="Fact000004">497</dei:DocumentType>
    <dei:EntityInvCompanyType contextRef="AsOf2026-06-26" id="Fact000005">N-1A</dei:EntityInvCompanyType>
    <dei:EntityCentralIndexKey contextRef="AsOf2026-06-26" id="Fact000006">0001426439</dei:EntityCentralIndexKey>
    <dei:EntityRegistrantName contextRef="AsOf2026-06-26" id="Fact000012">NEW YORK LIFE INVESTMENTS ACTIVE ETF TRUST</dei:EntityRegistrantName>
    <oef:SupplementToProspectusTextBlock
      contextRef="From2026-06-262026-06-26_custom_S000079855Member"
      id="Fact000014">&lt;p id="xdx_A8B_eoef--SupplementToProspectusTextBlock_zwYcs9SV7wi8" style="font: 10pt/normal Times New Roman, Times, serif; margin: 0pt 0pt 8pt; text-transform: none; color: #000000; text-indent: 0pt; text-align: center"&gt;&lt;span style="text-transform: none"&gt;Supplement dated &lt;span class="xdx_phnt_RGlzY2xvc3VyZSAtIEZvcm0gTi0xQSBDb3ZlcgA_" id="xdx_907_edei--DocumentPeriodEndDate_c20260626__20260626_z0kpdlbHR2Qb"&gt;June 26, 2026&lt;/span&gt; (&#x201c;Supplement&#x201d;) to the Fund&#x2019;s&lt;br/&gt;Summary Prospectus, Prospectus and Statement of Additional Information (the &#x201c;SAI&#x201d;), &lt;/span&gt;&lt;span style="text-transform: none"&gt;as supplemented&lt;/span&gt;&lt;/p&gt;
				&lt;p style="font: 10pt/normal Times New Roman, Times, serif; margin: 4pt 0pt 8pt; text-transform: uppercase; color: #000000; text-indent: 0pt; text-align: center"&gt;&lt;span style="text-transform: uppercase"&gt;&lt;b&gt;Important Notice Regarding Change in Name and Investment Policy&lt;/b&gt;&lt;/span&gt;&lt;/p&gt;
				&lt;p style="font: 10pt/normal Times New Roman, Times, serif; margin: 0pt 0pt 8pt; text-transform: none; color: #000000; text-indent: 0pt; text-align: justify"&gt;&lt;span style="text-transform: none; font-style: italic"&gt;&lt;i&gt;Capitalized terms and certain other terms used in this Supplement, unless otherwise defined in this Supplement, have the meanings assigned to them in the Summary Prospectus, Prospectus &lt;/i&gt;&lt;/span&gt;&lt;span style="text-transform: none; font-style: italic"&gt;&lt;i&gt;and SAI.&lt;/i&gt;&lt;/span&gt;&lt;/p&gt;
				&lt;p style="font: 10pt/normal Times New Roman, Times, serif; margin: 0pt 0pt 8pt; text-transform: none; color: #000000; text-indent: 0pt; text-align: justify"&gt;&lt;span style="text-transform: none"&gt;The Board of Trustees of New York Life Investments Active ETF Trust approved the changes described below to the Fund&#x2019;s name, ticker symbol, and non-fundamental investment policy adopted pursuant to Rule 35d-1 under the Investment Company Act of 1940, effective August &lt;/span&gt;&lt;span style="text-transform: none"&gt;28, 2026.&lt;/span&gt;&lt;/p&gt;
				&lt;p style="font: 10pt/normal Times New Roman, Times, serif; margin: 0pt 0pt 8pt; text-transform: none; color: #000000; text-indent: 0pt; text-align: justify"&gt;&lt;span style="text-transform: none"&gt;Effective August &lt;/span&gt;&lt;span style="text-transform: none"&gt;28, 2026:&lt;/span&gt;&lt;/p&gt;
				&lt;p style="font: 10pt/normal Times New Roman, Times, serif; margin: 0pt 0pt 8pt 43.2pt; text-transform: none; color: #000000; text-indent: -21.6pt; text-align: justify"&gt;&lt;span style="width: 21.59pt; text-indent: 0; display: inline-block"&gt;&lt;span style="text-transform: none"&gt;1.&lt;/span&gt;&lt;/span&gt;&lt;span style="text-transform: none"&gt;The Fund&#x2019;s name will change from the &#x201c;NYLI CBRE Real Assets ETF&#x201d; to the &#x201c;NYLIM CBRE Real Estate &amp;amp; &lt;/span&gt;&lt;span style="text-transform: none"&gt;Infrastructure ETF&#x201d;.&lt;/span&gt;&lt;/p&gt;
				&lt;p style="font: 10pt/normal Times New Roman, Times, serif; margin: 0pt 0pt 8pt 43.2pt; text-transform: none; color: #000000; text-indent: -21.6pt; text-align: justify"&gt;&lt;span style="width: 21.59pt; text-indent: 0; display: inline-block"&gt;&lt;span style="text-transform: none"&gt;2.&lt;/span&gt;&lt;/span&gt;&lt;span style="text-transform: none"&gt;The Fund&#x2019;s ticker will change from &#x201c;IQRA&#x201d; &lt;/span&gt;&lt;span style="text-transform: none"&gt;to &#x201c;REIX&#x201d;.&lt;/span&gt;&lt;/p&gt;
				</oef:SupplementToProspectusTextBlock>
    <dei:DocumentPeriodEndDate contextRef="AsOf2026-06-26" id="Fact000015">2026-06-26</dei:DocumentPeriodEndDate>
    <oef:StrategyNarrativeTextBlock
      contextRef="From2026-06-262026-06-26_custom_S000079855Member"
      id="Fact000016">&lt;p id="xdx_A80_eoef--StrategyNarrativeTextBlock_z4Ix9A2lG0O8" style="font: 10pt/normal Times New Roman, Times, serif; margin: 0pt 0pt 8pt 43.2pt; text-transform: none; color: #000000; text-indent: -21.6pt; text-align: justify"&gt;&lt;span style="width: 21.59pt; text-indent: 0; display: inline-block"&gt;&lt;span style="text-transform: none"&gt;3.&lt;/span&gt;&lt;/span&gt;&lt;span style="text-transform: none"&gt;The Fund&#x2019;s policy to invest, under normal circumstances, at least 80% of its assets (net assets plus the amount of any borrowings for investment purposes) in securities issued by real assets companies, will be revised &lt;/span&gt;&lt;span style="text-transform: none"&gt;as follows:&lt;/span&gt;&lt;/p&gt;
				&lt;p style="font: 10pt/normal Times New Roman, Times, serif; margin: 0pt 72pt 8pt; text-transform: none; color: #000000; text-indent: 0pt; text-align: justify"&gt;&lt;span style="text-transform: none"&gt;&lt;span id="xdx_901_eoef--StrategyPortfolioConcentration_c20260626__20260626__dei--LegalEntityAxis__custom--S000079855Member_zJeCw28KtpM1"&gt;The Fund will normally invest at least 80% of its assets (net assets plus the amount of any borrowings for investment purposes) in securities issued by real estate companies and infrastructure companies.&lt;/span&gt;&lt;/span&gt;&lt;/p&gt;
				</oef:StrategyNarrativeTextBlock>
    <oef:StrategyPortfolioConcentration
      contextRef="From2026-06-262026-06-26_custom_S000079855Member"
      id="Fact000017">The Fund will normally invest at least 80% of its assets (net assets plus the amount of any borrowings for investment purposes) in securities issued by real estate companies and infrastructure companies.</oef:StrategyPortfolioConcentration>
</xbrl>
