<?xml version="1.0" encoding="utf-8"?>
<xbrl
  xml:lang="en-US"
  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="c-1">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001645113</identifier>
        </entity>
        <period>
            <startDate>2026-10-01</startDate>
            <endDate>2026-10-31</endDate>
        </period>
    </context>
    <context id="c-2">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001645113</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OfferingAxis">
                    <dei:lineNo>1</dei:lineNo>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-10-01</startDate>
            <endDate>2026-10-31</endDate>
        </period>
    </context>
    <unit id="shares">
        <measure>shares</measure>
    </unit>
    <unit id="usd">
        <measure>iso4217:USD</measure>
    </unit>
    <unit id="number">
        <measure>pure</measure>
    </unit>
    <dei:EntityCentralIndexKey contextRef="c-1" id="f-1">0001645113</dei:EntityCentralIndexKey>
    <dei:EntityRegistrantName contextRef="c-1" id="f-2">NovoCure Limited</dei:EntityRegistrantName>
    <ffd:FormTp contextRef="c-1" id="f-3">S-8</ffd:FormTp>
    <ffd:SubmissnTp contextRef="c-1" id="f-4">S-8</ffd:SubmissnTp>
    <ffd:FeeExhibitTp contextRef="c-1" id="f-5">EX-FILING FEES</ffd:FeeExhibitTp>
    <ffd:OfferingSctyTp contextRef="c-2" id="f-6">Equity</ffd:OfferingSctyTp>
    <ffd:PrevslyPdFlg contextRef="c-2" id="f-7">false</ffd:PrevslyPdFlg>
    <ffd:OfferingSctyTitl contextRef="c-2" id="f-8">Ordinary Shares, no par value</ffd:OfferingSctyTitl>
    <ffd:FeesOthrRuleFlg contextRef="c-2" id="f-9">true</ffd:FeesOthrRuleFlg>
    <ffd:AmtSctiesRegd contextRef="c-2" decimals="0" id="f-10" unitRef="shares">13133749</ffd:AmtSctiesRegd>
    <ffd:MaxOfferingPricPerScty contextRef="c-2" decimals="2" id="f-11" unitRef="usd">14.43</ffd:MaxOfferingPricPerScty>
    <ffd:MaxAggtOfferingPric contextRef="c-2" decimals="2" id="f-12" unitRef="usd">189519998.07</ffd:MaxAggtOfferingPric>
    <ffd:FeeRate contextRef="c-2" decimals="7" id="f-13" unitRef="number">0.000087</ffd:FeeRate>
    <ffd:FeeAmt contextRef="c-2" decimals="2" id="f-14" unitRef="usd">16488.24</ffd:FeeAmt>
    <ffd:TtlOfferingAmt contextRef="c-1" decimals="2" id="f-15" unitRef="usd">189519998.07</ffd:TtlOfferingAmt>
    <ffd:TtlFeeAmt contextRef="c-1" decimals="2" id="f-16" unitRef="usd">16488.24</ffd:TtlFeeAmt>
    <ffd:TtlPrevslyPdAmt contextRef="c-1" decimals="2" id="f-17" unitRef="usd">0</ffd:TtlPrevslyPdAmt>
    <ffd:TtlOffsetAmt contextRef="c-1" decimals="2" id="f-18" unitRef="usd">0</ffd:TtlOffsetAmt>
    <ffd:NetFeeAmt contextRef="c-1" decimals="2" id="f-19" unitRef="usd">16488.24</ffd:NetFeeAmt>
    <ffd:OfferingNote contextRef="c-2" id="f-20">&lt;div style="padding-left:22.5pt;text-indent:-22.5pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"&gt;(1)&#160;&#160;&#160;&#160;This Registration Statement covers 13,133,749 ordinary shares of NovoCure Limited (the &#x201c;Registrant&#x201d;) available for issuance pursuant to awards under the NovoCure Limited Amended and Restated 2024 Omnibus Incentive Plan (the &#x201c;2024 Plan&#x201d;).&lt;/span&gt;&lt;/div&gt;&lt;div style="padding-left:22.5pt;text-indent:-22.5pt"&gt;&lt;span&gt;&lt;br/&gt;&lt;/span&gt;&lt;/div&gt;&lt;div style="padding-left:22.5pt;text-indent:-22.5pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"&gt;(2)&#160;&#160;&#160;&#160;Pursuant to Rule 416(a) under the Securities Act of 1933, as amended (the &#x201c;Securities Act&#x201d;), this Registration Statement also covers any additional securities of the Registrant that become issuable under the Plan relating to adjustments for changes resulting from a stock dividend, stock split, recapitalization or any other similar transaction effected without the receipt of consideration.&#160;&#160;&#160;&#160;&lt;/span&gt;&lt;/div&gt;(3)&#160;&#160;&#160;&#160;Completed pursuant to Rule 457(c) and Rule 457(h) of the Securities Act, based on the average of the high and low prices reported for the Registrant&#x2019;s ordinary shares on the NASDAQ Global Select Market on October 26, 2026.</ffd:OfferingNote>
</xbrl>
