<?xml version="1.0" encoding="utf-8"?>
<xbrl
  xmlns="http://www.xbrl.org/2003/instance"
  xmlns:dei="http://xbrl.sec.gov/dei/2026"
  xmlns:link="http://www.xbrl.org/2003/linkbase"
  xmlns:xlink="http://www.w3.org/1999/xlink">
    <link:schemaRef xlink:href="ttan-20260617.xsd" xlink:type="simple"/>
    <context id="C_0ee3c65a-b556-4e0f-a928-dbcebbbc6f3d">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001638826</identifier>
        </entity>
        <period>
            <startDate>2026-06-17</startDate>
            <endDate>2026-06-17</endDate>
        </period>
    </context>
    <dei:EntityCentralIndexKey
      contextRef="C_0ee3c65a-b556-4e0f-a928-dbcebbbc6f3d"
      id="F_474b8732-eae0-4f3c-abb6-61b003d07595">0001638826</dei:EntityCentralIndexKey>
    <dei:AmendmentFlag
      contextRef="C_0ee3c65a-b556-4e0f-a928-dbcebbbc6f3d"
      id="F_de9b1845-1fba-4e5c-9b87-cac302a59675">false</dei:AmendmentFlag>
    <dei:DocumentType
      contextRef="C_0ee3c65a-b556-4e0f-a928-dbcebbbc6f3d"
      id="F_917894f7-d813-4395-ad34-1bd505c0c4e7">8-K</dei:DocumentType>
    <dei:DocumentPeriodEndDate
      contextRef="C_0ee3c65a-b556-4e0f-a928-dbcebbbc6f3d"
      id="F_7d4fb207-ba9a-418c-9b83-e19d79b1da67">2026-06-17</dei:DocumentPeriodEndDate>
    <dei:EntityRegistrantName
      contextRef="C_0ee3c65a-b556-4e0f-a928-dbcebbbc6f3d"
      id="F_281f62a4-2f9d-4d42-80df-a6715bb7c176">ServiceTitan, Inc.</dei:EntityRegistrantName>
    <dei:EntityIncorporationStateCountryCode
      contextRef="C_0ee3c65a-b556-4e0f-a928-dbcebbbc6f3d"
      id="F_c19853e2-c095-43e5-9f9d-e1dd6b811acf">DE</dei:EntityIncorporationStateCountryCode>
    <dei:EntityFileNumber
      contextRef="C_0ee3c65a-b556-4e0f-a928-dbcebbbc6f3d"
      id="F_37cd4969-b601-4925-850f-72ceccbbf03c">001-42434</dei:EntityFileNumber>
    <dei:EntityTaxIdentificationNumber
      contextRef="C_0ee3c65a-b556-4e0f-a928-dbcebbbc6f3d"
      id="F_87f8a937-cb59-4a1d-950f-298181038338">26-0331862</dei:EntityTaxIdentificationNumber>
    <dei:EntityAddressAddressLine1
      contextRef="C_0ee3c65a-b556-4e0f-a928-dbcebbbc6f3d"
      id="F_35a75c52-69ab-480e-b5e9-bde772644743">800 N. Brand Blvd.</dei:EntityAddressAddressLine1>
    <dei:EntityAddressAddressLine2
      contextRef="C_0ee3c65a-b556-4e0f-a928-dbcebbbc6f3d"
      id="F_e4b6cfa9-43e1-462e-b664-a8954926c2e4">Suite 100</dei:EntityAddressAddressLine2>
    <dei:EntityAddressCityOrTown
      contextRef="C_0ee3c65a-b556-4e0f-a928-dbcebbbc6f3d"
      id="F_dfd224ef-8d10-47e9-8cba-62f770606ee6">Glendale</dei:EntityAddressCityOrTown>
    <dei:EntityAddressStateOrProvince
      contextRef="C_0ee3c65a-b556-4e0f-a928-dbcebbbc6f3d"
      id="F_e050ab6a-fdf1-478f-8237-eaf75d211a6e">CA</dei:EntityAddressStateOrProvince>
    <dei:EntityAddressPostalZipCode
      contextRef="C_0ee3c65a-b556-4e0f-a928-dbcebbbc6f3d"
      id="F_65820643-fc1a-49a6-a155-bc549a1bc320">91203</dei:EntityAddressPostalZipCode>
    <dei:CityAreaCode
      contextRef="C_0ee3c65a-b556-4e0f-a928-dbcebbbc6f3d"
      id="F_d97e833f-f83f-4ccc-8183-84a1f08b3588">(855)</dei:CityAreaCode>
    <dei:LocalPhoneNumber
      contextRef="C_0ee3c65a-b556-4e0f-a928-dbcebbbc6f3d"
      id="F_bc395ea9-daf7-467f-bfcb-22819a0a0c46">899-0970</dei:LocalPhoneNumber>
    <dei:WrittenCommunications
      contextRef="C_0ee3c65a-b556-4e0f-a928-dbcebbbc6f3d"
      id="F_b280597d-4c86-4854-97c4-9d0f99326b0e">false</dei:WrittenCommunications>
    <dei:SolicitingMaterial
      contextRef="C_0ee3c65a-b556-4e0f-a928-dbcebbbc6f3d"
      id="F_0b32067c-21c4-4e98-9cde-d6dfb6a3741f">false</dei:SolicitingMaterial>
    <dei:PreCommencementTenderOffer
      contextRef="C_0ee3c65a-b556-4e0f-a928-dbcebbbc6f3d"
      id="F_fce7a2bc-cf8a-49fd-9b7a-6cf7b430944e">false</dei:PreCommencementTenderOffer>
    <dei:PreCommencementIssuerTenderOffer
      contextRef="C_0ee3c65a-b556-4e0f-a928-dbcebbbc6f3d"
      id="F_2ff1b305-949c-4976-840a-14151461b1e6">false</dei:PreCommencementIssuerTenderOffer>
    <dei:Security12bTitle
      contextRef="C_0ee3c65a-b556-4e0f-a928-dbcebbbc6f3d"
      id="F_0ea0ce65-b96a-4983-a8f2-8bc2f79bec87">Class A Common Stock, par value $0.001 per share</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="C_0ee3c65a-b556-4e0f-a928-dbcebbbc6f3d"
      id="F_3f73b08c-2320-42f1-a92e-c03425e3cb7f">TTAN</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="C_0ee3c65a-b556-4e0f-a928-dbcebbbc6f3d"
      id="F_4311a81e-a1f9-4627-8177-6cb78cbfcdc2">NASDAQ</dei:SecurityExchangeName>
    <dei:EntityEmergingGrowthCompany
      contextRef="C_0ee3c65a-b556-4e0f-a928-dbcebbbc6f3d"
      id="F_bf20ced8-7f7b-4695-b58c-8936cd6403a7">false</dei:EntityEmergingGrowthCompany>
</xbrl>
