<?xml version="1.0" encoding="utf-8"?>
<xbrl
  xmlns="http://www.xbrl.org/2003/instance"
  xmlns:dei="http://xbrl.sec.gov/dei/2025"
  xmlns:ffd="http://xbrl.sec.gov/ffd/2025"
  xmlns:iso4217="http://www.xbrl.org/2003/iso4217"
  xmlns:link="http://www.xbrl.org/2003/linkbase"
  xmlns:xbrldi="http://xbrl.org/2006/xbrldi"
  xmlns:xlink="http://www.w3.org/1999/xlink"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    <link:schemaRef
      xlink:href="https://xbrl.sec.gov/ffd/2025/ffd-2025.xsd"
      xlink:type="simple"/>
    <context id="rc">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0002044725</identifier>
        </entity>
        <period>
            <startDate>2025-10-16</startDate>
            <endDate>2025-10-16</endDate>
        </period>
    </context>
    <context id="offrl_1">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0002044725</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OfferingAxis">
                    <dei:lineNo>1</dei:lineNo>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2025-10-16</startDate>
            <endDate>2025-10-16</endDate>
        </period>
    </context>
    <context id="offrl_2">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0002044725</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OfferingAxis">
                    <dei:lineNo>2</dei:lineNo>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2025-10-16</startDate>
            <endDate>2025-10-16</endDate>
        </period>
    </context>
    <unit id="USD">
        <measure>iso4217:USD</measure>
    </unit>
    <unit id="pure">
        <measure>pure</measure>
    </unit>
    <unit id="Shares">
        <measure>shares</measure>
    </unit>
    <ffd:FormTp contextRef="rc" id="ixv-341">S-1</ffd:FormTp>
    <ffd:SubmissnTp contextRef="rc" id="ixv-342">S-1/A</ffd:SubmissnTp>
    <ffd:FeeExhibitTp contextRef="rc" id="ixv-343">EX-FILING FEES</ffd:FeeExhibitTp>
    <ffd:RegnFileNb contextRef="rc" id="ixv-344">333-290793</ffd:RegnFileNb>
    <dei:EntityCentralIndexKey contextRef="rc" id="ixv-345">0002044725</dei:EntityCentralIndexKey>
    <dei:EntityRegistrantName contextRef="rc" id="ixv-346">Evommune, Inc.</dei:EntityRegistrantName>
    <ffd:OfferingTableNa contextRef="rc" id="hiddenrcOfferingTableNa" xsi:nil="true"/>
    <ffd:OffsetTableNa contextRef="rc" id="hiddenrcOffsetTableNa">N/A</ffd:OffsetTableNa>
    <ffd:CombinedProspectusTableNa contextRef="rc" id="hiddenrcCombinedProspectusTableNa">N/A</ffd:CombinedProspectusTableNa>
    <ffd:FormTp contextRef="rc" id="ixv-383">S-1</ffd:FormTp>
    <dei:EntityRegistrantName contextRef="rc" id="ixv-384">Evommune, Inc.</dei:EntityRegistrantName>
    <ffd:PrevslyPdFlg contextRef="offrl_1" id="ixv-385">false</ffd:PrevslyPdFlg>
    <ffd:OfferingSctyTp contextRef="offrl_1" id="ixv-386">Equity</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl contextRef="offrl_1" id="ixv-387">Common Stock, par value $0.0001 per share</ffd:OfferingSctyTitl>
    <ffd:Rule457aFlg contextRef="offrl_1" id="ixv-388">true</ffd:Rule457aFlg>
    <ffd:AmtSctiesRegd
      contextRef="offrl_1"
      decimals="0"
      id="ixv-389"
      unitRef="Shares">12937500</ffd:AmtSctiesRegd>
    <ffd:MaxOfferingPricPerScty
      contextRef="offrl_1"
      decimals="INF"
      id="ixv-390"
      unitRef="USD">17.00</ffd:MaxOfferingPricPerScty>
    <ffd:MaxAggtOfferingPric
      contextRef="offrl_1"
      decimals="INF"
      id="ixv-391"
      unitRef="USD">219937500.00</ffd:MaxAggtOfferingPric>
    <ffd:FeeRate
      contextRef="offrl_1"
      decimals="INF"
      id="ixv-392"
      unitRef="pure">0.0001381</ffd:FeeRate>
    <ffd:FeeAmt
      contextRef="offrl_1"
      decimals="INF"
      id="ixv-393"
      unitRef="USD">30373.37</ffd:FeeAmt>
    <ffd:PrevslyPdFlg contextRef="offrl_2" id="ixv-394">true</ffd:PrevslyPdFlg>
    <ffd:OfferingSctyTp contextRef="offrl_2" id="ixv-395">Equity</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl contextRef="offrl_2" id="ixv-396">Common Stock, par value $0.0001 per share</ffd:OfferingSctyTitl>
    <ffd:Rule457oFlg contextRef="offrl_2" id="ixv-397">true</ffd:Rule457oFlg>
    <ffd:MaxAggtOfferingPric
      contextRef="offrl_2"
      decimals="INF"
      id="ixv-398"
      unitRef="USD">100000000.00</ffd:MaxAggtOfferingPric>
    <ffd:FeeAmt
      contextRef="offrl_2"
      decimals="INF"
      id="ixv-399"
      unitRef="USD">13810.00</ffd:FeeAmt>
    <ffd:TtlOfferingAmt contextRef="rc" decimals="INF" id="ixv-400" unitRef="USD">319937500.00</ffd:TtlOfferingAmt>
    <ffd:TtlFeeAmt contextRef="rc" decimals="INF" id="ixv-401" unitRef="USD">44183.37</ffd:TtlFeeAmt>
    <ffd:TtlPrevslyPdAmt contextRef="rc" decimals="INF" id="ixv-402" unitRef="USD">13810.00</ffd:TtlPrevslyPdAmt>
    <ffd:TtlOffsetAmt contextRef="rc" decimals="INF" id="ixv-403" unitRef="USD">0.00</ffd:TtlOffsetAmt>
    <ffd:NetFeeAmt contextRef="rc" decimals="INF" id="ixv-404" unitRef="USD">30373.37</ffd:NetFeeAmt>
    <ffd:OfferingNote contextRef="offrl_1" id="ixv-405">1a. Estimated solely for the purpose of calculating the registration fee pursuant to Rule 457(a) under the Securities Act of 1933, as amended. 1b. Includes the aggregate offering price of additional shares that the underwriters have the option to purchase or additional shares that may be issued if the number of shares included in this offering is increased. </ffd:OfferingNote>
    <ffd:OfferingNote contextRef="offrl_2" id="ixv-406">2a. Estimated solely for the purpose of calculating the registration fee pursuant to Rule 457(o) under the Securities Act of 1933, as amended. 2b. See note 1b. above. </ffd:OfferingNote>
</xbrl>
