<?xml version="1.0" encoding="utf-8"?>
<xbrl
  xmlns="http://www.xbrl.org/2003/instance"
  xmlns:dei="http://xbrl.sec.gov/dei/2026"
  xmlns:ffd="http://xbrl.sec.gov/ffd/2026"
  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">
    <link:schemaRef
      xlink:href="https://xbrl.sec.gov/ffd/2026/ffd-2026.xsd"
      xlink:type="simple"/>
    <context id="c0">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0002108654</identifier>
        </entity>
        <period>
            <startDate>2026-11-02</startDate>
            <endDate>2026-11-02</endDate>
        </period>
    </context>
    <context id="c1">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0002108654</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OfferingAxis">
                    <dei:lineNo>1</dei:lineNo>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-11-02</startDate>
            <endDate>2026-11-02</endDate>
        </period>
    </context>
    <unit id="usd">
        <measure>iso4217:USD</measure>
    </unit>
    <unit id="pure">
        <measure>pure</measure>
    </unit>
    <ffd:SubmissnTp contextRef="c0" id="ixv-192">N-2</ffd:SubmissnTp>
    <ffd:FormTp contextRef="c0" id="ixv-193">N-2</ffd:FormTp>
    <dei:EntityRegistrantName contextRef="c0" id="ixv-18">Fortress Multi-Asset Credit Fund</dei:EntityRegistrantName>
    <ffd:PrevslyPdFlg contextRef="c1" id="ixv-194">false</ffd:PrevslyPdFlg>
    <ffd:OfferingSctyTp contextRef="c1" id="ixv-195">Equity</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl contextRef="c1" id="ixv-196">Common Shares of Beneficial Interest</ffd:OfferingSctyTitl>
    <ffd:Rule457oFlg contextRef="c1" id="ixv-197">true</ffd:Rule457oFlg>
    <ffd:MaxAggtOfferingPric contextRef="c1" decimals="INF" id="ixv-198" unitRef="usd">1000000</ffd:MaxAggtOfferingPric>
    <ffd:FeeRate contextRef="c1" decimals="INF" id="ixv-199" unitRef="pure">0.000087</ffd:FeeRate>
    <ffd:FeeAmt contextRef="c1" decimals="2" id="ixv-200" unitRef="usd">87</ffd:FeeAmt>
    <ffd:TtlOfferingAmt contextRef="c0" decimals="INF" id="ixv-201" unitRef="usd">1000000</ffd:TtlOfferingAmt>
    <ffd:TtlFeeAmt contextRef="c0" decimals="2" id="ixv-202" unitRef="usd">87</ffd:TtlFeeAmt>
    <ffd:TtlPrevslyPdAmt contextRef="c0" decimals="0" id="ixv-203" unitRef="usd">0</ffd:TtlPrevslyPdAmt>
    <ffd:TtlOffsetAmt contextRef="c0" decimals="0" id="ixv-204" unitRef="usd">0</ffd:TtlOffsetAmt>
    <ffd:NetFeeAmt contextRef="c0" decimals="2" id="ixv-205" unitRef="usd">87</ffd:NetFeeAmt>
    <ffd:OfferingNote contextRef="c1" id="ixv-178">&lt;table style="font-size: 12pt; width:100%;"&gt;&lt;tr style="height: 0px; font-size: 0px;"&gt;&lt;td style="width: 1%;"&gt;&#160;&lt;/td&gt;&lt;td style="width: 99%;"&gt;&#160;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td style="font-size: 10pt; vertical-align: top;"&gt;(1)&lt;/td&gt;&lt;td style="font-size: 10pt;"&gt;This registration statement relates to the aggregate offering of $1,000,000 of common shares of beneficial interest of the Fund. The Maximum Aggregate Offering Price is estimated pursuant to Rule 457(o) under the Securities Act of 1933, as amended, solely for purposes of calculating the registration fee. &lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;</ffd:OfferingNote>
    <ffd:CombinedProspectusTableNa contextRef="c0" id="ixv-208">N/A</ffd:CombinedProspectusTableNa>
    <dei:EntityCentralIndexKey contextRef="c0" id="ixv-209">0002108654</dei:EntityCentralIndexKey>
    <ffd:FeeExhibitTp contextRef="c0" id="ixv-210">EX-FILING FEES</ffd:FeeExhibitTp>
    <ffd:OffsetTableNa contextRef="c0" id="ixv-211">N/A</ffd:OffsetTableNa>
</xbrl>
