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  xmlns:val="http://valaris.com/20261113"
  xmlns:xbrldi="http://xbrl.org/2006/xbrldi"
  xmlns:xlink="http://www.w3.org/1999/xlink">
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        <entity>
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        <period>
            <startDate>2026-11-13</startDate>
            <endDate>2026-11-13</endDate>
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            <endDate>2026-11-13</endDate>
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    </context>
    <dei:AmendmentFlag
      contextRef="c20261113to20261113"
      id="Fact_d99377619f5d43a9ae77213f3db72259">false</dei:AmendmentFlag>
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      contextRef="c20261113to20261113"
      id="Fact_0ab24773d722460eade8851ce1f4f89f">0000314808</dei:EntityCentralIndexKey>
    <dei:DocumentType
      contextRef="c20261113to20261113"
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      contextRef="c20261113to20261113"
      id="Fact_7c5a4a042aba4f2fbe2450bcd2bb4bca">2026-11-13</dei:DocumentPeriodEndDate>
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      contextRef="c20261113to20261113"
      id="Fact_e7743cc2414a4c08b9e48448d0606b58">Valaris Limited</dei:EntityRegistrantName>
    <dei:EntityIncorporationStateCountryCode
      contextRef="c20261113to20261113"
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    <dei:EntityFileNumber
      contextRef="c20261113to20261113"
      id="Fact_d07a5f06af9143aea772267a5bd5dfef">001-08097</dei:EntityFileNumber>
    <dei:EntityTaxIdentificationNumber
      contextRef="c20261113to20261113"
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      contextRef="c20261113to20261113"
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    <dei:EntityAddressCityOrTown
      contextRef="c20261113to20261113"
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    <dei:EntityAddressCountry
      contextRef="c20261113to20261113"
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    <dei:EntityAddressPostalZipCode
      contextRef="c20261113to20261113"
      id="Fact_1d38e7ac47fb4563a4ed7e526d7afb51">HM 08</dei:EntityAddressPostalZipCode>
    <dei:CityAreaCode
      contextRef="c20261113to20261113"
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      contextRef="c20261113to20261113"
      id="Fact_0035aa7a95ce441aa5cc68220e38e4f7">7659 4660</dei:LocalPhoneNumber>
    <dei:WrittenCommunications
      contextRef="c20261113to20261113"
      id="Fact_3c1ee67f4f6d409e9e76cbbc16488e08">false</dei:WrittenCommunications>
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      contextRef="c20261113to20261113"
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      contextRef="c20261113to20261113"
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    <dei:PreCommencementIssuerTenderOffer
      contextRef="c20261113to20261113"
      id="Fact_9127504300f248848c2fdb57f0e417a8">false</dei:PreCommencementIssuerTenderOffer>
    <dei:Security12bTitle
      contextRef="c20261113to20261113_StatementClassOfStockAxis_CommonStockMember"
      id="Fact_510ee51ccd2f456d8ea528ffe8b70aea">Common Shares, $0.01 par value share</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="c20261113to20261113_StatementClassOfStockAxis_CommonStockMember"
      id="Fact_26bd3fd5a2b4464487e89ed954079f27">VAL</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="c20261113to20261113_StatementClassOfStockAxis_CommonStockMember"
      id="Fact_26e3c6cefd4e49318bbb6e405b4ca765">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="c20261113to20261113_StatementClassOfStockAxis_WarrantsToPurchaseCommonSharesMember"
      id="Fact_e81bdcf06d1b40cebc0f6b45ee9f23ef">Warrants to purchase Common Shares</dei:Security12bTitle>
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      contextRef="c20261113to20261113_StatementClassOfStockAxis_WarrantsToPurchaseCommonSharesMember"
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