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  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"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    <link:schemaRef
      xlink:href="https://xbrl.sec.gov/ffd/2026/ffd-2026.xsd"
      xlink:type="simple"/>
    <context id="rc">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0002063345</identifier>
        </entity>
        <period>
            <startDate>2026-08-27</startDate>
            <endDate>2026-08-27</endDate>
        </period>
    </context>
    <context id="offrl_1">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0002063345</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OfferingAxis">
                    <dei:lineNo>1</dei:lineNo>
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        </entity>
        <period>
            <startDate>2026-08-27</startDate>
            <endDate>2026-08-27</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-351">F-4</ffd:FormTp>
    <ffd:SubmissnTp contextRef="rc" id="ixv-352">F-4</ffd:SubmissnTp>
    <ffd:FeeExhibitTp contextRef="rc" id="ixv-353">EX-FILING FEES</ffd:FeeExhibitTp>
    <dei:EntityCentralIndexKey contextRef="rc" id="ixv-354">0002063345</dei:EntityCentralIndexKey>
    <dei:EntityRegistrantName contextRef="rc" id="ixv-355">Cadeler Ltd</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">F-4</ffd:FormTp>
    <dei:EntityRegistrantName contextRef="rc" id="ixv-384">Cadeler Ltd</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">Ordinary shares, with a nominal value of $1.00 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">386053341</ffd:AmtSctiesRegd>
    <ffd:MaxAggtOfferingPric
      contextRef="offrl_1"
      decimals="2"
      id="ixv-390"
      unitRef="USD">2313424645.94</ffd:MaxAggtOfferingPric>
    <ffd:FeeRate
      contextRef="offrl_1"
      decimals="7"
      id="ixv-391"
      unitRef="pure">0.0001381</ffd:FeeRate>
    <ffd:FeeAmt
      contextRef="offrl_1"
      decimals="2"
      id="ixv-392"
      unitRef="USD">319483.94</ffd:FeeAmt>
    <ffd:TtlOfferingAmt contextRef="rc" decimals="2" id="ixv-393" unitRef="USD">2313424645.94</ffd:TtlOfferingAmt>
    <ffd:TtlFeeAmt contextRef="rc" decimals="2" id="ixv-394" unitRef="USD">319483.94</ffd:TtlFeeAmt>
    <ffd:TtlPrevslyPdAmt contextRef="rc" decimals="2" id="ixv-395" unitRef="USD">0.00</ffd:TtlPrevslyPdAmt>
    <ffd:TtlOffsetAmt contextRef="rc" decimals="2" id="ixv-396" unitRef="USD">0.00</ffd:TtlOffsetAmt>
    <ffd:NetFeeAmt contextRef="rc" decimals="2" id="ixv-397" unitRef="USD">319483.94</ffd:NetFeeAmt>
    <ffd:Rule457fFlg contextRef="offrl_1" id="ixv-398">true</ffd:Rule457fFlg>
    <ffd:OfferingNote contextRef="offrl_1" id="ixv-399">Represents the maximum number of ordinary shares of Cadeler Limited ("NewCo," and such shares, "NewCo Shares") estimated to be issuable upon consummation of the offer described herein, calculated on the basis of an exchange ratio of one (1) NewCo Share for each ordinary share, with a nominal value of DKK 1.00 per share (each, a "Cadeler Share"), of Cadeler A/S ("Cadeler"), including Cadeler Shares represented by American Depositary Shares of Cadeler (each representing four (4) Cadeler Shares, "Cadeler ADSs"), and 386,053,341 Cadeler Shares (including Cadeler Shares represented by Cadeler ADSs) outstanding as of August 20, 2026.

Estimated solely for the purpose of calculating the registration fee pursuant to Rule 457(c) and Rule 457(f)(1) under the Securities Act, the proposed maximum aggregate offering price of the securities being registered was calculated as the product obtained by multiplying (i) $5.9925, the average of the high and low sales prices per Cadeler ADS on August 20, 2026, as reported by the New York Stock Exchange, divided by four, the Cadeler Share-to-ADS ratio, and (ii) 386,053,341, the estimated maximum number of Cadeler Shares (including Cadeler Shares represented by Cadeler ADSs) that may be exchanged in the offer described herein. In accordance with Rule 416, this Registration Statement also covers an indeterminate number of additional NewCo Shares as may be issuable as a result of stock splits, stock dividends or similar transactions.</ffd:OfferingNote>
    <ffd:AmtSctiesRcvd
      contextRef="offrl_1"
      decimals="0"
      id="ixv-400"
      unitRef="Shares">386053341</ffd:AmtSctiesRcvd>
    <ffd:ValSctiesRcvdPerShr
      contextRef="offrl_1"
      decimals="4"
      id="ixv-401"
      unitRef="USD">5.9925</ffd:ValSctiesRcvdPerShr>
    <ffd:ValSctiesRcvd
      contextRef="offrl_1"
      decimals="2"
      id="ixv-402"
      unitRef="USD">2313424645.94</ffd:ValSctiesRcvd>
    <ffd:FeeNoteMaxAggtOfferingPric
      contextRef="offrl_1"
      decimals="2"
      id="ixv-403"
      unitRef="USD">2313424645.94</ffd:FeeNoteMaxAggtOfferingPric>
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