<?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"
  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>2026-09-16</startDate>
            <endDate>2026-09-16</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>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-09-16</startDate>
            <endDate>2026-09-16</endDate>
        </period>
    </context>
    <context id="ofst_1">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0002063345</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OffsetAxis">
                    <dei:lineNo>1</dei:lineNo>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-09-16</startDate>
            <endDate>2026-09-16</endDate>
        </period>
    </context>
    <context id="ofst_2">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0002063345</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OffsetAxis">
                    <dei:lineNo>2</dei:lineNo>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-09-16</startDate>
            <endDate>2026-09-16</endDate>
        </period>
    </context>
    <unit id="USD">
        <measure>iso4217:USD</measure>
    </unit>
    <unit id="pure">
        <measure>pure</measure>
    </unit>
    <ffd:FormTp contextRef="rc" id="ixv-170">SC TO</ffd:FormTp>
    <ffd:SubmissnTp contextRef="rc" id="ixv-171">SC TO-T</ffd:SubmissnTp>
    <ffd:FeeExhibitTp contextRef="rc" id="ixv-172">EX-FILING FEES</ffd:FeeExhibitTp>
    <dei:EntityCentralIndexKey contextRef="rc" id="ixv-173">0002063345</dei:EntityCentralIndexKey>
    <dei:EntityRegistrantName contextRef="rc" id="ixv-174">Cadeler plc</dei:EntityRegistrantName>
    <ffd:OfferingTableNa contextRef="rc" id="hiddenrcOfferingTableNa" xsi:nil="true"/>
    <ffd:OffsetTableNa contextRef="rc" id="hiddenrcOffsetTableNa" xsi:nil="true"/>
    <ffd:Rule011Flg contextRef="offrl_1" id="ixv-177">true</ffd:Rule011Flg>
    <ffd:OffsetClmdInd contextRef="ofst_1" id="ixv-178">true</ffd:OffsetClmdInd>
    <ffd:OffsetClmdInd contextRef="ofst_2" id="ixv-179">false</ffd:OffsetClmdInd>
    <ffd:PrevslyPdFlg contextRef="offrl_1" id="ixv-222">false</ffd:PrevslyPdFlg>
    <ffd:TxValtn
      contextRef="offrl_1"
      decimals="2"
      id="ixv-223"
      unitRef="USD">2381471372.96</ffd:TxValtn>
    <ffd:FeeRate
      contextRef="offrl_1"
      decimals="7"
      id="ixv-224"
      unitRef="pure">0.0001381</ffd:FeeRate>
    <ffd:FeeAmt
      contextRef="offrl_1"
      decimals="2"
      id="ixv-225"
      unitRef="USD">328881.20</ffd:FeeAmt>
    <ffd:TtlTxValtn contextRef="rc" decimals="2" id="ixv-226" unitRef="USD">2381471372.96</ffd:TtlTxValtn>
    <ffd:TtlFeeAmt contextRef="rc" decimals="2" id="ixv-227" unitRef="USD">328881.20</ffd:TtlFeeAmt>
    <ffd:TtlPrevslyPdAmt contextRef="rc" decimals="2" id="ixv-228" unitRef="USD">0.00</ffd:TtlPrevslyPdAmt>
    <ffd:TtlOffsetAmt contextRef="rc" decimals="2" id="ixv-229" unitRef="USD">319483.94</ffd:TtlOffsetAmt>
    <ffd:NetFeeAmt contextRef="rc" decimals="2" id="ixv-230" unitRef="USD">9397.26</ffd:NetFeeAmt>
    <ffd:OfferingNote contextRef="offrl_1" id="ixv-231">Estimated solely for the purpose of calculating the filing fee pursuant to Rule 0-11(d) under the Securities Exchange Act of 1934, as amended (the "Exchange Act"), the transaction value was calculated as the product obtained by multiplying (i) $6.16875, the average of the high and low sales prices per American Depositary Share of Cadeler A/S ("Cadeler", each representing four (4) Cadeler Shares (as defined below)(each a "Cadeler ADS") on September 15, 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 ordinary shares of Cadeler, with a nominal value of DKK 1.00 per share (each, a "Cadeler Share") (including Cadeler Shares represented by Cadeler ADSs) that may be exchanged in the offer described herein.

The amount of the filing fee was calculated in accordance with Rule 0-11(d) under the Exchange Act and Fee Rate Advisory No. 1 for Fiscal Year 2026 beginning on October 1, 2025, issued August 25, 2025, as the product obtained by multiplying the transaction value by 0.0001381.</ffd:OfferingNote>
    <ffd:Rule011a2OffsetFlg contextRef="ofst_1" id="ixv-232">true</ffd:Rule011a2OffsetFlg>
    <ffd:OffsetPrrFormTp contextRef="ofst_1" id="ixv-233">F-4</ffd:OffsetPrrFormTp>
    <ffd:OffsetPrrFileNb contextRef="ofst_1" id="ixv-234">333-298599</ffd:OffsetPrrFileNb>
    <ffd:OffsetClmInitlFilgDt contextRef="ofst_1" id="ixv-235">2026-08-27</ffd:OffsetClmInitlFilgDt>
    <ffd:OffsetClmdAmt contextRef="ofst_1" decimals="2" id="ixv-236" unitRef="USD">319483.94</ffd:OffsetClmdAmt>
    <ffd:Rule011a2OffsetFlg contextRef="ofst_2" id="ixv-237">true</ffd:Rule011a2OffsetFlg>
    <ffd:OffsetPrrFilerNm contextRef="ofst_2" id="ixv-238">Cadeler plc</ffd:OffsetPrrFilerNm>
    <ffd:OffsetPrrFormTp contextRef="ofst_2" id="ixv-239">F-4</ffd:OffsetPrrFormTp>
    <ffd:OffsetPrrFileNb contextRef="ofst_2" id="ixv-240">333-298599</ffd:OffsetPrrFileNb>
    <ffd:OffsetSrcFilgDt contextRef="ofst_2" id="ixv-241">2026-08-27</ffd:OffsetSrcFilgDt>
    <ffd:OffsetPrrFeeAmt contextRef="ofst_2" decimals="2" id="ixv-242" unitRef="USD">319483.94</ffd:OffsetPrrFeeAmt>
    <ffd:OffsetExpltnForClmdAmt contextRef="ofst_1" id="ixv-243">The Registrant paid $319,483.94 with the submission of its Registration Statement on Form F-4, filed with the Securities and Exchange Commission on August 27, 2026 (File No. 333-298599).</ffd:OffsetExpltnForClmdAmt>
</xbrl>
