<?xml version="1.0" encoding="utf-8"?>
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  xmlns:val="http://valaris.com/20261014"
  xmlns:xbrldi="http://xbrl.org/2006/xbrldi"
  xmlns:xlink="http://www.w3.org/1999/xlink">
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    <context id="c20261014to20261014">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000314808</identifier>
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        <period>
            <startDate>2026-10-14</startDate>
            <endDate>2026-10-14</endDate>
        </period>
    </context>
    <context id="c20261014to20261014_StatementClassOfStockAxis_WarrantsToPurchaseCommonSharesMember">
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            <endDate>2026-10-14</endDate>
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        <entity>
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            <segment>
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            <endDate>2026-10-14</endDate>
        </period>
    </context>
    <dei:AmendmentFlag
      contextRef="c20261014to20261014"
      id="Fact_61880f915e2a41e29094a07de724f0f7">false</dei:AmendmentFlag>
    <dei:EntityCentralIndexKey
      contextRef="c20261014to20261014"
      id="Fact_8366a23697c8461895ced12bcc9a7df0">0000314808</dei:EntityCentralIndexKey>
    <dei:DocumentType
      contextRef="c20261014to20261014"
      id="Fact_e402df39e8e44e48a2a51d5a91cabdac">8-K</dei:DocumentType>
    <dei:DocumentPeriodEndDate
      contextRef="c20261014to20261014"
      id="Fact_70e4e2543b2a42e7a5fe73aec97fd20f">2026-10-14</dei:DocumentPeriodEndDate>
    <dei:EntityRegistrantName
      contextRef="c20261014to20261014"
      id="Fact_73835a29a2ad4751a7b6287989b9586b">Valaris Limited</dei:EntityRegistrantName>
    <dei:EntityIncorporationStateCountryCode
      contextRef="c20261014to20261014"
      id="Fact_a3ad06f7ab6c4e19aa51377a2e1e25d5">D0</dei:EntityIncorporationStateCountryCode>
    <dei:EntityFileNumber
      contextRef="c20261014to20261014"
      id="Fact_58754fef1d08476b8687067c27e8fe81">001-08097</dei:EntityFileNumber>
    <dei:EntityTaxIdentificationNumber
      contextRef="c20261014to20261014"
      id="Fact_9515ca9657b14e95bee818b17ec36e51">98-1589854</dei:EntityTaxIdentificationNumber>
    <dei:EntityAddressAddressLine1
      contextRef="c20261014to20261014"
      id="Fact_e8579b789836402fb0708e4442d7cddc">Richmond House</dei:EntityAddressAddressLine1>
    <dei:EntityAddressAddressLine2
      contextRef="c20261014to20261014"
      id="Fact_33d4c5d52d2743309886c2777291e227">12 Par-la-Ville Road</dei:EntityAddressAddressLine2>
    <dei:EntityAddressCityOrTown
      contextRef="c20261014to20261014"
      id="Fact_104ce7df2c7b4a8e8a5c6635bb68ba1e">Hamilton</dei:EntityAddressCityOrTown>
    <dei:EntityAddressCountry
      contextRef="c20261014to20261014"
      id="Fact_1bc1ed76b8214cf882fb44b901660fcf">BM</dei:EntityAddressCountry>
    <dei:EntityAddressPostalZipCode
      contextRef="c20261014to20261014"
      id="Fact_dd3652c2c06847e1afa8c98a7313d83e">HM 08</dei:EntityAddressPostalZipCode>
    <dei:CityAreaCode
      contextRef="c20261014to20261014"
      id="Fact_321e564850ff48d6bfdaff31f73d4a96">44 (0)</dei:CityAreaCode>
    <dei:LocalPhoneNumber
      contextRef="c20261014to20261014"
      id="Fact_d7566b88dcf54031919dc61487a07985">20 7659 4660</dei:LocalPhoneNumber>
    <dei:WrittenCommunications
      contextRef="c20261014to20261014"
      id="Fact_d09cbfd587b5433dad2fc93e9d59f12d">false</dei:WrittenCommunications>
    <dei:SolicitingMaterial
      contextRef="c20261014to20261014"
      id="Fact_99bacf5060e54ad19056a7b293c93b3e">false</dei:SolicitingMaterial>
    <dei:PreCommencementTenderOffer
      contextRef="c20261014to20261014"
      id="Fact_3525bc982ec74e4fbe1ea02716690b83">false</dei:PreCommencementTenderOffer>
    <dei:PreCommencementIssuerTenderOffer
      contextRef="c20261014to20261014"
      id="Fact_95f1dc6c664d45488549f8c1bc7f2c8c">false</dei:PreCommencementIssuerTenderOffer>
    <dei:Security12bTitle
      contextRef="c20261014to20261014_StatementClassOfStockAxis_CommonStockMember"
      id="Fact_98635f3cf2d046489c17df795b09dac2">Common Shares, $0.01 par value share</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="c20261014to20261014_StatementClassOfStockAxis_CommonStockMember"
      id="Fact_5279b14813414a7694e2d8b3843e6f60">VAL</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="c20261014to20261014_StatementClassOfStockAxis_CommonStockMember"
      id="Fact_f039ed9a5d004943abfd85d2bfd70155">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="c20261014to20261014_StatementClassOfStockAxis_WarrantsToPurchaseCommonSharesMember"
      id="Fact_36b08f0907ea4b9fa618c12652327232">Warrants to purchase Common Shares</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="c20261014to20261014_StatementClassOfStockAxis_WarrantsToPurchaseCommonSharesMember"
      id="Fact_38ed97034e99460cb1fed47179c392fe">VAL WS</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="c20261014to20261014_StatementClassOfStockAxis_WarrantsToPurchaseCommonSharesMember"
      id="Fact_d804025e0d6544ed8c02ef544dfa23dc">NYSE</dei:SecurityExchangeName>
    <dei:EntityEmergingGrowthCompany
      contextRef="c20261014to20261014"
      id="Fact_7e864d3ca23944daa9679a2e8c1b8409">false</dei:EntityEmergingGrowthCompany>
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