<?xml version="1.0" encoding="utf-8"?>
<xbrl
  xmlns="http://www.xbrl.org/2003/instance"
  xmlns:cik0000787441="http://www.mainstayinvestments.com/20251031"
  xmlns:dei="http://xbrl.sec.gov/dei/2025"
  xmlns:link="http://www.xbrl.org/2003/linkbase"
  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="c497-20260925.xsd" xlink:type="simple"/>
    <context id="Context_20251031_20251031">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000787441</identifier>
        </entity>
        <period>
            <startDate>2025-10-31</startDate>
            <endDate>2025-10-31</endDate>
        </period>
    </context>
    <context id="Context_20251031_20251031_S000006906Member_S000006906SummaryMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000787441</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">cik0000787441:S000006906Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2025-10-31</startDate>
            <endDate>2025-10-31</endDate>
        </period>
    </context>
    <oef:RiskReturnHeading
      contextRef="Context_20251031_20251031_S000006906Member_S000006906SummaryMember"
      id="ixv-261">NYLIM WMC Value Fund</oef:RiskReturnHeading>
    <oef:SupplementToProspectusTextBlock
      contextRef="Context_20251031_20251031_S000006906Member_S000006906SummaryMember"
      id="ixv-11">&lt;p style="margin-top:revert; margin-bottom:revert; font-size:10.0pt; font-family:Serif; font-style:normal; text-align:center; font-weight:normal; text-decoration:none;"&gt;Supplement dated September 25, 2026 (&#x201c;Supplement&#x201d;) to the Summary Prospectus 
dated February 28, 2026, &lt;/p&gt;&lt;p style="margin-top:revert; margin-bottom:revert; font-size:10.0pt; font-family:Serif; font-style:normal; text-align:center; font-weight:normal; text-decoration:none;"&gt;as revised August 28, 2026, and the Prospectus and Statement 
of Additional Information (&#x201c;SAI&#x201d;) &lt;/p&gt;&lt;p style="margin-top:revert; margin-bottom:revert; font-size:10.0pt; font-family:Serif; font-style:normal; text-align:center; font-weight:normal; text-decoration:none;"&gt;dated February 28, 2026, as supplemented&lt;/p&gt;&lt;p style="margin-top:revert; margin-bottom:revert; font-size:10.0pt; font-family:Serif; font-style:normal; text-align:center; font-weight:bold; text-decoration:none;"&gt;Important 
Notice Regarding Changes to Name and Investment Policies&lt;/p&gt;&lt;p style="margin-top:revert; margin-bottom:revert; font-size:10.0pt; font-family:Serif; text-align:center; font-weight:normal; font-style:normal;"&gt;&lt;span style="font-size:10.0pt; font-family:Serif; font-style:italic; font-weight:normal; text-decoration:none;"&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 and SAI.&lt;/span&gt;&lt;/p&gt;&lt;p style="margin-top:revert; margin-bottom:revert; font-size:10.0pt; font-family:Serif; text-align:left; font-weight:normal; font-style:normal;"&gt;&lt;span style="font-size:10.0pt; font-family:Serif; font-style:italic; font-weight:normal; text-decoration:none;"&gt;&#160;&lt;/span&gt;&lt;/p&gt;&lt;p style="margin-top:revert; margin-bottom:revert; font-size:10.0pt; font-family:Serif; font-style:normal; text-align:justify; font-weight:normal; text-decoration:none;"&gt;At 
a meeting held on September 23-24, 2026, the Board of Trustees (&#x201c;Board&#x201d;) of NYLIM Funds (&#x201c;Trust&#x201d;) 
considered and approved, among other related proposals: (i) appointing Los Angeles Capital Management 
LLC (&#x201c;LACM&#x201d;) as the Fund&#x2019;s subadvisor and the related subadvisory agreement; (ii) changing the 
Fund&#x2019;s name and modifying the Fund&#x2019;s principal investment strategies, investment process and principal 
risks; (iii) adopting a non-fundamental investment policy pursuant to Rule 35d-1 (the &#x201c;Names Rule&#x201d;) 
of the Investment Company Act of 1940, as amended; and (iv) reducing the contractual management fee. 
 These changes do not require shareholder approval.  &lt;/p&gt;&lt;p style="margin-top:revert; margin-bottom:revert; font-size:10.0pt; font-family:Serif; text-align:left; font-weight:normal; text-decoration:none; font-style:italic;"&gt;As a result, effective 
on or about December 11, 2026, the following changes will be made to the Summary Prospectus, Prospectus 
and SAI:&lt;/p&gt;&lt;p style="margin-top:revert; margin-bottom:revert; font-size:10.0pt; font-family:Serif; text-align:justify; font-weight:normal; font-style:normal;"&gt;&lt;span style="font-size:10.0pt; font-family:Serif; font-style:normal; font-weight:normal; text-decoration:none;"&gt;1.&lt;/span&gt;&lt;span style="word-spacing:10.0pt;"&gt;&#160;&lt;/span&gt;&lt;span style="font-size:10.0pt; font-family:Serif; font-style:italic; font-weight:bold; text-decoration:none;"&gt;Name Change.&#160;&lt;/span&gt;&lt;span style="font-size:10.0pt; font-family:Serif; font-style:normal; font-weight:normal; text-decoration:none;"&gt;The name of the Fund is changed to NYLIM 
LACM Large Cap Value Fund.&lt;/span&gt;&lt;/p&gt;&lt;p style="margin-top:revert; margin-bottom:revert; font-size:10.0pt; font-family:Serif; text-align:justify; font-weight:normal; font-style:normal;"&gt;&lt;span style="font-size:10.0pt; font-family:Serif; font-style:normal; font-weight:normal; text-decoration:none;"&gt;2.&lt;/span&gt;&lt;span style="word-spacing:10.0pt;"&gt;&#160;&lt;/span&gt;&lt;span style="font-size:10.0pt; font-family:Serif; font-style:italic; font-weight:bold; text-decoration:none;"&gt;Fees 
and Expenses of the Fund and Example. &lt;/span&gt;&lt;span style="font-size:10.0pt; font-family:Serif; font-style:normal; font-weight:normal; text-decoration:none;"&gt;The Fund&#x2019;s fees and expenses table is updated to reflect 
the &lt;/span&gt;&lt;span style="word-spacing:10.0pt;"&gt;&#160;&lt;/span&gt;&lt;span style="font-size:10.0pt; font-family:Serif; font-style:normal; font-weight:normal; text-decoration:none;"&gt;following:&lt;/span&gt;&lt;span style="font-size:10.0pt; font-family:Serif; font-style:italic; font-weight:bold; text-decoration:none;"&gt; &lt;/span&gt;&lt;/p&gt;&lt;p style="margin-top:revert; margin-bottom:revert; font-size:10.0pt; font-family:Serif; text-align:left; font-weight:normal; margin-left:36.0pt; font-style:normal;"&gt;&lt;span style="font-size:10.0pt; font-family:Serif; font-style:normal; font-weight:normal; text-decoration:none;"&gt;The 
contractual management fee rate is revised to read as follows: 0.60% on assets up to $1 billion; 0.56% 
on assets from $1 billion to $3 billion; and &lt;/span&gt;&lt;span style="font-size:10.0pt; font-family:Serif; font-style:normal; font-weight:normal; text-decoration:none;"&gt;0.54&lt;/span&gt;&lt;span style="font-size:10.0pt; font-family:Serif; font-style:normal; font-weight:normal; text-decoration:none;"&gt;% on assets over $3 
billion.&lt;/span&gt;&lt;/p&gt;&lt;p style="margin-top:revert; margin-bottom:revert; font-size:10.0pt; font-family:Serif; text-align:left; text-indent:-36.0pt; font-weight:normal; margin-left:36.0pt; font-style:normal;"&gt;&lt;span style="font-size:10.0pt; font-family:Serif; font-style:normal; font-weight:normal; text-decoration:none;"&gt;3.&lt;/span&gt;&lt;span style="word-spacing:19.0pt;"&gt;&#160;&lt;/span&gt;&lt;span style="font-size:10.0pt; font-family:Serif; font-style:italic; font-weight:bold; text-decoration:none;"&gt;Principal 
Investment Strategies.&lt;/span&gt;&lt;span style="font-size:10.0pt; font-family:Serif; font-style:normal; font-weight:normal; text-decoration:none;"&gt;&#160;The section of the Summary Prospectus and Prospectus entitled &#x201c;Principal Investment 
Strategies&#x201d; is deleted in its entirety and replaced with the following:&lt;/span&gt;&lt;/p&gt;&lt;p style="margin-top:revert; margin-bottom:revert; font-size:10.0pt; font-family:Serif; font-style:normal; text-align:left; font-weight:normal; text-decoration:none;"&gt;&#160;&lt;/p&gt;&lt;p style="margin-top:revert; margin-bottom:revert; font-size:10.0pt; font-family:Serif; text-align:left; font-weight:normal; margin-left:36.0pt; font-style:normal;"&gt;&lt;span style="font-size:10.0pt; font-family:Serif; font-style:normal; font-weight:normal; text-decoration:none;"&gt;Under normal circumstances, the Fund will invest at least 80% of its assets (net 
assets plus the amount of any borrowings for investment purposes) in equity securities and equity-related 
securities of large capitalization value companies. Los Angeles Capital Management LLC, the Fund&#x2019;s 
Subadvisor, defines large-capitalization value securities as securities of companies included in the 
Russell 1000&lt;/span&gt;&lt;span style="font-size:10.0pt; font-family:Serif; font-style:normal; font-weight:normal; text-decoration:none;"&gt;&lt;sup&gt;&#xae;&lt;/sup&gt;&lt;/span&gt;&lt;span style="font-size:10.0pt; font-family:Serif; font-style:normal; font-weight:normal; text-decoration:none;"&gt; Value Index, which had market capitalizations ranging from 
&lt;/span&gt;&lt;span style="font-size:10.0pt; font-family:Serif; font-style:normal; color:#333333; font-weight:normal; text-decoration:none;"&gt;$623 million to $4.5 trillion&lt;/span&gt;&lt;span style="font-size:10.0pt; font-family:Serif; font-style:normal; font-weight:normal; text-decoration:none;"&gt; as of July 31, 2026. &lt;/span&gt;&lt;span style="font-size:10.0pt; font-family:Serif; font-style:normal; font-weight:normal; text-decoration:none;"&gt;The Fund may invest 
up to 20% of its assets in securities outside of the Russell 1000&lt;/span&gt;&lt;span style="font-size:10.0pt; font-family:Serif; font-style:normal; font-weight:normal; text-decoration:none;"&gt;&lt;sup&gt;&#xae;&lt;/sup&gt;&lt;/span&gt;&lt;span style="font-size:10.0pt; font-family:Serif; font-style:normal; font-weight:normal; text-decoration:none;"&gt; 
Value Index.&lt;/span&gt;&lt;/p&gt;&lt;p style="margin-top:revert; margin-bottom:revert; font-size:10.0pt; font-family:Serif; text-align:left; font-weight:normal; margin-left:36.0pt; font-style:normal;"&gt;&lt;span style="font-size:10.0pt; font-family:Serif; font-style:normal; font-weight:normal; text-decoration:none;"&gt;Equity securities include common stock, preferred stock and 
equity-equivalent securities, such as securities convertible into common stock. Equity or equity-related 
securities represent an ownership interest, or the right to acquire an ownership interest, in an issuer. 
An issuer of a security is considered to be a U.S. or foreign issuer based on the issuer&#x2019;s &#x201c;country 
of risk&#x201d; (or similar designation) as determined by a third-party such as Bloomberg.&lt;/span&gt;&lt;/p&gt;&lt;p style="margin-top:revert; margin-bottom:revert; font-size:10.0pt; font-family:Serif; text-align:left; font-weight:normal; margin-left:36.0pt; font-style:normal;"&gt;&lt;span style="font-size:10.0pt; font-family:Serif; font-style:normal; font-weight:bold; text-decoration:none;"&gt;Investment 
Process:&lt;/span&gt;&lt;span style="font-size:10.0pt; font-family:Serif; font-style:normal; font-weight:normal; text-decoration:none;"&gt; The Fund&#x2019;s Subadvisor employs a quantitative investment process for security 
selection and risk management using a proprietary quantitative model. The model considers a range of 
valuation, earnings, financial, market, and management characteristics to identify current drivers of 
return. Utilizing these characteristics, the Subadvisor seeks to construct a forward-looking portfolio 
designed to manage risk and adapt to changing market conditions.&lt;/span&gt;&lt;/p&gt;&lt;p style="margin-top:revert; margin-bottom:revert; font-size:10.0pt; font-family:Serif; text-align:left; font-weight:normal; margin-left:36.0pt; font-style:normal;"&gt;&lt;span style="font-size:10.0pt; font-family:Serif; font-style:normal; font-weight:normal; text-decoration:none;"&gt;By 
including fundamental data inputs and, through the use of statistical tools, the model estimates expected 
returns through a multi-step process.&lt;/span&gt;&lt;/p&gt;&lt;p style="margin-top:revert; margin-bottom:revert; font-size:10.0pt; font-family:Serif; text-align:left; font-weight:normal; font-style:normal;"&gt;&lt;span style="word-spacing:10.0pt;"&gt;&#160;&lt;/span&gt;&lt;span style="font-size:10.0pt; font-family:Serif; font-style:normal; font-weight:normal; text-decoration:none;"&gt;The Fund&#x2019;s portfolio 
is rebalanced periodically using the model.&lt;/span&gt;&lt;/p&gt;&lt;p style="margin-top:revert; margin-bottom:revert; font-size:10.0pt; font-family:Serif; text-align:left; font-weight:normal; font-style:normal;"&gt;&lt;span style="word-spacing:10.0pt;"&gt;&#160;&lt;/span&gt;&lt;span style="font-size:10.0pt; font-family:Serif; font-style:normal; font-weight:normal; text-decoration:none;"&gt;The Subadvisor seeks to generate incremental investment returns 
above the Fund&#x2019;s benchmark, while attempting &lt;/span&gt;&lt;span style="word-spacing:10.0pt;"&gt;&#160;&lt;/span&gt;&lt;span style="font-size:10.0pt; font-family:Serif; font-style:normal; font-weight:normal; text-decoration:none;"&gt;to 
control investment risk relative to the benchmark. The Subadvisor may sell a security if it believes 
its &lt;/span&gt;&lt;span style="word-spacing:10.0pt;"&gt;&#160;&lt;/span&gt;&lt;span style="font-size:10.0pt; font-family:Serif; font-style:normal; font-weight:normal; text-decoration:none;"&gt;investment objectives have been met or 
when the security is deemed less attractive relative to another security on &lt;/span&gt;&lt;span style="word-spacing:10.0pt;"&gt;&#160;&lt;/span&gt;&lt;span style="font-size:10.0pt; font-family:Serif; font-style:normal; font-weight:normal; text-decoration:none;"&gt;a 
return/risk basis. &lt;/span&gt;&lt;/p&gt;&lt;p style="margin-top:revert; margin-bottom:revert; font-size:10.0pt; font-family:Serif; text-align:justify; text-indent:-36.0pt; font-weight:normal; margin-left:36.0pt; font-style:normal;"&gt;&lt;span style="font-size:10.0pt; font-family:Serif; font-style:normal; font-weight:normal; text-decoration:none;"&gt;4.&lt;/span&gt;&lt;span style="word-spacing:19.0pt;"&gt;&#160;&lt;/span&gt;&lt;span style="font-size:10.0pt; font-family:Serif; font-style:italic; font-weight:bold; text-decoration:none;"&gt;Principal 
Risks.&#160;&lt;/span&gt;&lt;span style="font-size:10.0pt; font-family:Serif; font-style:normal; font-weight:normal; text-decoration:none;"&gt;The section of the Summary Prospectus and Prospectus entitled&#160;&lt;/span&gt;&lt;span style="font-size:10.0pt; font-family:Serif; font-style:normal; font-weight:bold; text-decoration:none;"&gt;&#x201c;Principal Risks&#x201d;&#160;&lt;/span&gt;&lt;span style="font-size:10.0pt; font-family:Serif; font-style:normal; font-weight:normal; text-decoration:none;"&gt;is 
revised as follows:&lt;/span&gt;&lt;span style="font-size:10.0pt; font-family:Serif; font-style:normal; font-weight:normal; text-decoration:none;"&gt; &lt;/span&gt;&lt;/p&gt;&lt;p style="margin-top:revert; margin-bottom:revert; font-size:10.0pt; font-family:Serif; font-style:normal; text-align:justify; text-indent:-36.0pt; font-weight:normal; margin-left:72.0pt; text-decoration:none;"&gt;&lt;span style="font-size:10.0pt; font-family:Serif; font-style:normal; font-weight:normal; text-decoration:none;"&gt;a.&lt;/span&gt;&lt;span style="word-spacing:19.0pt;"&gt;&#160;&lt;/span&gt;&lt;span style="font-size:10.0pt; font-family:Serif; font-style:normal; font-weight:normal; text-decoration:none;"&gt;The &#x201c;Foreign Securities Risk&#x201d;, &#x201c;Depositary Receipts 
Risk&#x201d; and &#x201c;Emerging Markets Risk&#x201d; are deleted in their entirety.&lt;/span&gt;&lt;/p&gt;&lt;p style="margin-top:revert; margin-bottom:revert; font-size:10.0pt; font-family:Serif; font-style:normal; text-align:justify; text-indent:-36.0pt; font-weight:normal; margin-left:36.0pt; text-decoration:none;"&gt;&lt;span style="word-spacing:19.0pt;"&gt;&#160;&lt;/span&gt;&lt;span style="font-size:10.0pt; font-family:Serif; font-style:normal; font-weight:normal; text-decoration:none;"&gt;b.&lt;/span&gt;&lt;span style="word-spacing:19.0pt;"&gt;&#160;&lt;/span&gt;&lt;span style="font-size:10.0pt; font-family:Serif; font-style:normal; font-weight:normal; text-decoration:none;"&gt;The 
&#x201c;Portfolio Management Risk&#x201d; is deleted in its entirety and replaced with the following:&lt;/span&gt;&lt;/p&gt;&lt;p style="margin-top:revert; margin-bottom:revert; font-size:10.0pt; font-family:Serif; text-align:justify; text-indent:-36.0pt; font-weight:normal; margin-left:36.0pt; font-style:normal;"&gt;&lt;span style="word-spacing:19.0pt;"&gt;&#160;&lt;/span&gt;&lt;span style="font-size:10.0pt; font-family:Serif; font-style:normal; font-weight:bold; text-decoration:none;"&gt;Portfolio Management Risk: 
&lt;/span&gt;&lt;span style="font-size:10.0pt; font-family:Serif; font-style:normal; font-weight:normal; text-decoration:none;"&gt;The 
investment strategies, practices and risk analyses used by the Subadvisor may not produce the desired 
results or expected returns. The quantitative screening performed by the Subadvisor, and the securities 
selected based on the screening, may not perform as expected. The quantitative screening may adversely 
affect the Fund&#x2019;s performance. There may also be technical issues with the construction and implementation 
of quantitative models (for example, software or other technology malfunctions, or programming inaccuracies). 
In addition, the Fund&#x2019;s performance will reflect, in part, the Subadvisor&#x2019;s ability to make active 
qualitative decisions. &lt;/span&gt;&lt;/p&gt;&lt;p style="margin-top:revert; margin-bottom:revert; font-size:10.0pt; font-family:Serif; text-align:justify; text-indent:-36.0pt; font-weight:normal; margin-left:36.0pt; font-style:normal;"&gt;&lt;span style="word-spacing:19.0pt;"&gt;&#160;&lt;/span&gt;&lt;span style="font-size:10.0pt; font-family:Serif; font-style:normal; font-weight:normal; text-decoration:none;"&gt;In 
addition, the selection of &#x201c;Foreign Securities and Currency Risk&#x201d;, &#x201c;Depositary Receipts Risk&#x201d;, 
and &#x201c;Emerging Markets Risk&#x201d;  for the Fund under the &lt;/span&gt;&lt;span style="font-size:10.0pt; font-family:Serif; font-style:normal; font-weight:bold; text-decoration:none;"&gt;&#x201c;More About Investment Strategies and Risks&#x2014;Additional 
Information About Risks&#x201d;&lt;/span&gt;&lt;span style="font-size:10.0pt; font-family:Serif; font-style:normal; font-weight:normal; text-decoration:none;"&gt; section of the Prospectus is changed to reflect that each 
is an Additional Risk of the Fund.&lt;/span&gt;&lt;/p&gt;&lt;p style="margin-top:revert; margin-bottom:revert; font-size:10.0pt; font-family:Serif; text-align:left; text-indent:-33.0pt; font-weight:normal; margin-left:36.0pt; font-style:normal;"&gt;&lt;span style="font-size:10.0pt; font-family:Serif; font-style:normal; font-weight:normal; text-decoration:none;"&gt;5.&lt;/span&gt;&lt;span style="font-size:10.0pt; font-family:Serif; font-style:italic; font-weight:bold; text-decoration:none;"&gt; &lt;/span&gt;&lt;span style="word-spacing:17.5pt;"&gt;&#160;&lt;/span&gt;&lt;span style="font-size:10.0pt; font-family:Serif; font-style:italic; font-weight:bold; text-decoration:none;"&gt;Past 
Performance.   &lt;/span&gt;&lt;span style="font-size:10.0pt; font-family:Serif; font-style:normal; font-weight:normal; text-decoration:none;"&gt;The following is inserted as the last paragraph of the section of the Summary 
Prospectus and Prospectus entitled &lt;/span&gt;&lt;span style="font-size:10.0pt; font-family:Serif; font-style:normal; font-weight:bold; text-decoration:none;"&gt;&#x201c;Past Performance&#x201d;:&lt;/span&gt;&lt;/p&gt;&lt;p style="margin-top:revert; margin-bottom:revert; font-size:10.0pt; font-family:Serif; font-style:normal; text-align:left; font-weight:normal; margin-left:36.0pt; text-decoration:none;"&gt;Effective 
December 11, 2026, the Fund replaced its subadvisor and modified its principal investment strategies. 
The past performance in the bar chart and table prior to that date reflects the Fund&#x2019;s prior subadvisors 
and principal investment strategies.&lt;/p&gt;</oef:SupplementToProspectusTextBlock>
    <oef:ProspectusDate contextRef="Context_20251031_20251031" id="ixv-262">2026-02-28</oef:ProspectusDate>
    <dei:DocumentType contextRef="Context_20251031_20251031" id="ixv-265">497</dei:DocumentType>
    <dei:DocumentPeriodEndDate contextRef="Context_20251031_20251031" id="ixv-266">2025-10-31</dei:DocumentPeriodEndDate>
    <dei:EntityCentralIndexKey contextRef="Context_20251031_20251031" id="ixv-267">0000787441</dei:EntityCentralIndexKey>
    <dei:AmendmentFlag contextRef="Context_20251031_20251031" id="ixv-268">false</dei:AmendmentFlag>
    <dei:DocumentCreationDate contextRef="Context_20251031_20251031" id="ixv-269">2026-09-25</dei:DocumentCreationDate>
    <dei:DocumentEffectiveDate contextRef="Context_20251031_20251031" id="ixv-270">2026-09-25</dei:DocumentEffectiveDate>
    <dei:EntityInvCompanyType contextRef="Context_20251031_20251031" id="ixv-271">N-1A</dei:EntityInvCompanyType>
    <dei:EntityRegistrantName contextRef="Context_20251031_20251031" id="ixv-295">NYLIM FUNDS</dei:EntityRegistrantName>
</xbrl>
