<?xml version="1.0" encoding="utf-8"?>
<xbrl
  xmlns="http://www.xbrl.org/2003/instance"
  xmlns:dei="http://xbrl.sec.gov/dei/2025"
  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="pmvp-20251112.xsd" xlink:type="simple"/>
    <context id="C_b853630c-58e6-4b7f-9d37-89f641cbd547">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001699382</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:EntityAddressesAddressTypeAxis">dei:FormerAddressMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2025-11-12</startDate>
            <endDate>2025-11-12</endDate>
        </period>
    </context>
    <context id="C_2e5d05f9-8c6f-400f-971d-bed52c56c02e">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001699382</identifier>
        </entity>
        <period>
            <startDate>2025-11-12</startDate>
            <endDate>2025-11-12</endDate>
        </period>
    </context>
    <dei:EntityCentralIndexKey
      contextRef="C_2e5d05f9-8c6f-400f-971d-bed52c56c02e"
      id="F_05b86a6a-0e02-48d8-a6cc-f635364a4036">0001699382</dei:EntityCentralIndexKey>
    <dei:AmendmentFlag
      contextRef="C_2e5d05f9-8c6f-400f-971d-bed52c56c02e"
      id="F_ff3d264f-41f6-4f40-adb4-2b7247513a86">false</dei:AmendmentFlag>
    <dei:DocumentType
      contextRef="C_2e5d05f9-8c6f-400f-971d-bed52c56c02e"
      id="F_07367283-037c-4338-8d40-29f9bf4c28b9">8-K</dei:DocumentType>
    <dei:DocumentPeriodEndDate
      contextRef="C_2e5d05f9-8c6f-400f-971d-bed52c56c02e"
      id="F_e7fa936a-a25d-40f0-bfd9-5ff6925f141d">2025-11-12</dei:DocumentPeriodEndDate>
    <dei:EntityRegistrantName
      contextRef="C_2e5d05f9-8c6f-400f-971d-bed52c56c02e"
      id="F_6fc859f5-adae-4d8e-8627-601bdca7e5be">PMV Pharmaceuticals, Inc.</dei:EntityRegistrantName>
    <dei:EntityIncorporationStateCountryCode
      contextRef="C_2e5d05f9-8c6f-400f-971d-bed52c56c02e"
      id="F_dfd8244b-dd96-442f-82d0-cc709aa40675">DE</dei:EntityIncorporationStateCountryCode>
    <dei:EntityFileNumber
      contextRef="C_2e5d05f9-8c6f-400f-971d-bed52c56c02e"
      id="F_b21b85c8-0ea9-474e-9965-c21807c079dd">001-39539</dei:EntityFileNumber>
    <dei:EntityTaxIdentificationNumber
      contextRef="C_2e5d05f9-8c6f-400f-971d-bed52c56c02e"
      id="F_4adc2a5d-3f39-4d0a-8082-bcef61424c0b">46-3218129</dei:EntityTaxIdentificationNumber>
    <dei:EntityAddressAddressLine1
      contextRef="C_2e5d05f9-8c6f-400f-971d-bed52c56c02e"
      id="F_3b616434-6e8a-4bac-a497-44eb5b5c014a">400 Alexander Park Drive</dei:EntityAddressAddressLine1>
    <dei:EntityAddressAddressLine2
      contextRef="C_2e5d05f9-8c6f-400f-971d-bed52c56c02e"
      id="F_f31494f1-93c0-4b7d-b7b7-b85574473b09">Suite 301</dei:EntityAddressAddressLine2>
    <dei:EntityAddressCityOrTown
      contextRef="C_2e5d05f9-8c6f-400f-971d-bed52c56c02e"
      id="F_a93549a0-6d2f-48b7-bd42-a8a3f4e02cc7">Princeton</dei:EntityAddressCityOrTown>
    <dei:EntityAddressStateOrProvince
      contextRef="C_2e5d05f9-8c6f-400f-971d-bed52c56c02e"
      id="F_469f6453-7f24-479d-889f-c48813d184f6">NJ</dei:EntityAddressStateOrProvince>
    <dei:EntityAddressPostalZipCode
      contextRef="C_2e5d05f9-8c6f-400f-971d-bed52c56c02e"
      id="F_5f0d34ea-7104-49f9-a62d-75e45f860ede">08540</dei:EntityAddressPostalZipCode>
    <dei:CityAreaCode
      contextRef="C_2e5d05f9-8c6f-400f-971d-bed52c56c02e"
      id="F_1b515e56-43da-463c-ac9a-67e625d31703">(609)</dei:CityAreaCode>
    <dei:LocalPhoneNumber
      contextRef="C_2e5d05f9-8c6f-400f-971d-bed52c56c02e"
      id="F_d9b806ce-337e-4987-9075-2e894258eb2f">642-6670</dei:LocalPhoneNumber>
    <dei:EntityAddressAddressLine1
      contextRef="C_b853630c-58e6-4b7f-9d37-89f641cbd547"
      id="F_05a92eb1-f038-4269-8afc-00717906b28f">One Research Way</dei:EntityAddressAddressLine1>
    <dei:EntityAddressCityOrTown
      contextRef="C_b853630c-58e6-4b7f-9d37-89f641cbd547"
      id="F_0357e10a-01c3-4661-bda8-d1a9b4cf0279">Princeton</dei:EntityAddressCityOrTown>
    <dei:EntityAddressStateOrProvince
      contextRef="C_b853630c-58e6-4b7f-9d37-89f641cbd547"
      id="F_f50abe8b-2780-4493-93ae-8c1ed94013d9">NJ</dei:EntityAddressStateOrProvince>
    <dei:EntityAddressPostalZipCode
      contextRef="C_b853630c-58e6-4b7f-9d37-89f641cbd547"
      id="F_60201585-5705-4305-b47a-fec3bc3b5c38">08540</dei:EntityAddressPostalZipCode>
    <dei:WrittenCommunications
      contextRef="C_2e5d05f9-8c6f-400f-971d-bed52c56c02e"
      id="F_30fb46be-fa13-4e8e-82c2-17e48009d95f">false</dei:WrittenCommunications>
    <dei:SolicitingMaterial
      contextRef="C_2e5d05f9-8c6f-400f-971d-bed52c56c02e"
      id="F_d615cbd4-b358-4304-a3bb-be2f5055c9a4">false</dei:SolicitingMaterial>
    <dei:PreCommencementTenderOffer
      contextRef="C_2e5d05f9-8c6f-400f-971d-bed52c56c02e"
      id="F_ddf651f3-1ac5-4f5b-a62b-bb1530e32725">false</dei:PreCommencementTenderOffer>
    <dei:PreCommencementIssuerTenderOffer
      contextRef="C_2e5d05f9-8c6f-400f-971d-bed52c56c02e"
      id="F_bc408f68-4139-49c8-a92a-f8669ab5f013">false</dei:PreCommencementIssuerTenderOffer>
    <dei:Security12bTitle
      contextRef="C_2e5d05f9-8c6f-400f-971d-bed52c56c02e"
      id="F_c49c1303-9627-498d-8699-68336df438c0">Common Stock, $0.00001 par value per share</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="C_2e5d05f9-8c6f-400f-971d-bed52c56c02e"
      id="F_df8e83ec-53b0-4944-99e9-62bb1a548225">PMVP</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="C_2e5d05f9-8c6f-400f-971d-bed52c56c02e"
      id="F_fce27974-b318-463b-8d26-1d713bfe5f3c">NASDAQ</dei:SecurityExchangeName>
    <dei:EntityEmergingGrowthCompany
      contextRef="C_2e5d05f9-8c6f-400f-971d-bed52c56c02e"
      id="F_ad42b8b2-7bb7-466f-bd73-ceb31fae52b9">false</dei:EntityEmergingGrowthCompany>
</xbrl>
