<?xml version="1.0" encoding="utf-8"?>
<xbrl
  xmlns="http://www.xbrl.org/2003/instance"
  xmlns:alur="http://www.allurion.com/20260721"
  xmlns:dei="http://xbrl.sec.gov/dei/2026"
  xmlns:link="http://www.xbrl.org/2003/linkbase"
  xmlns:us-gaap="http://fasb.org/us-gaap/2026"
  xmlns:xbrldi="http://xbrl.org/2006/xbrldi"
  xmlns:xlink="http://www.w3.org/1999/xlink">
    <link:schemaRef xlink:href="alur-20260721.xsd" xlink:type="simple"/>
    <context id="C_95d99d7c-98de-4906-af66-086edad9f046">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001964979</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">alur:CommonStockParValue00001PerShareMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-07-21</startDate>
            <endDate>2026-07-21</endDate>
        </period>
    </context>
    <context id="C_e79c76c3-6bd1-4323-b9b2-ec405d215aee">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001964979</identifier>
        </entity>
        <period>
            <startDate>2026-07-21</startDate>
            <endDate>2026-07-21</endDate>
        </period>
    </context>
    <context id="C_54a88667-0528-4273-8e83-67b6954f124e">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001964979</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">alur:WarrantsToPurchase000378787SharesOfCommonStockEachAtAnExercisePriceOf303750PerShareOfCommonStockMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-07-21</startDate>
            <endDate>2026-07-21</endDate>
        </period>
    </context>
    <dei:AmendmentFlag
      contextRef="C_e79c76c3-6bd1-4323-b9b2-ec405d215aee"
      id="F_e522534d-030e-4751-b46d-d8e84b387143">false</dei:AmendmentFlag>
    <dei:EntityCentralIndexKey
      contextRef="C_e79c76c3-6bd1-4323-b9b2-ec405d215aee"
      id="F_b37f78cc-60bc-40a7-9a18-6af3c9d609f9">0001964979</dei:EntityCentralIndexKey>
    <dei:SecurityExchangeName
      contextRef="C_95d99d7c-98de-4906-af66-086edad9f046"
      id="F_a54643e1-c2ad-4582-94db-f0df296cd1a2">NONE</dei:SecurityExchangeName>
    <dei:SecurityExchangeName
      contextRef="C_54a88667-0528-4273-8e83-67b6954f124e"
      id="F_eb6ae44b-284e-4a25-b8d0-7c3b3cb5cbbe">NONE</dei:SecurityExchangeName>
    <dei:DocumentType
      contextRef="C_e79c76c3-6bd1-4323-b9b2-ec405d215aee"
      id="F_e1bf3be8-eab0-47c2-91f4-39617c7054a8">8-K</dei:DocumentType>
    <dei:DocumentPeriodEndDate
      contextRef="C_e79c76c3-6bd1-4323-b9b2-ec405d215aee"
      id="F_51dd5a17-bf16-4e59-9c81-1f612b85fe95">2026-07-21</dei:DocumentPeriodEndDate>
    <dei:EntityRegistrantName
      contextRef="C_e79c76c3-6bd1-4323-b9b2-ec405d215aee"
      id="F_7635a295-9053-4497-8ac2-52171a3da8cc">Allurion Technologies, Inc.</dei:EntityRegistrantName>
    <dei:EntityIncorporationStateCountryCode
      contextRef="C_e79c76c3-6bd1-4323-b9b2-ec405d215aee"
      id="F_777fde88-e64c-40a4-83cc-35ce18672afa">DE</dei:EntityIncorporationStateCountryCode>
    <dei:EntityFileNumber
      contextRef="C_e79c76c3-6bd1-4323-b9b2-ec405d215aee"
      id="F_fc0f2cc4-aa45-4f2e-b2aa-f7104718b2c1">001-41767</dei:EntityFileNumber>
    <dei:EntityTaxIdentificationNumber
      contextRef="C_e79c76c3-6bd1-4323-b9b2-ec405d215aee"
      id="F_5d7b9afd-294a-4487-8ff6-10864a72d327">92-2182207</dei:EntityTaxIdentificationNumber>
    <dei:EntityAddressAddressLine1
      contextRef="C_e79c76c3-6bd1-4323-b9b2-ec405d215aee"
      id="F_d26c2d02-1147-46ec-bd47-01f9244864d6">11 Huron Drive</dei:EntityAddressAddressLine1>
    <dei:EntityAddressCityOrTown
      contextRef="C_e79c76c3-6bd1-4323-b9b2-ec405d215aee"
      id="F_3fa6a0b7-2e62-458f-ab7b-62109b737680">Natick</dei:EntityAddressCityOrTown>
    <dei:EntityAddressStateOrProvince
      contextRef="C_e79c76c3-6bd1-4323-b9b2-ec405d215aee"
      id="F_87e122e3-f7e6-4064-b3dc-2af25fbbce9f">MA</dei:EntityAddressStateOrProvince>
    <dei:EntityAddressPostalZipCode
      contextRef="C_e79c76c3-6bd1-4323-b9b2-ec405d215aee"
      id="F_da2814f0-16b5-4ee6-8eee-1ebcc0f36e62">01760</dei:EntityAddressPostalZipCode>
    <dei:CityAreaCode
      contextRef="C_e79c76c3-6bd1-4323-b9b2-ec405d215aee"
      id="F_397a9541-5087-4b3e-aab8-1fcd903ed19c">(508)</dei:CityAreaCode>
    <dei:LocalPhoneNumber
      contextRef="C_e79c76c3-6bd1-4323-b9b2-ec405d215aee"
      id="F_4a8758e2-881d-436e-a070-674fd9a0793b">647-4000</dei:LocalPhoneNumber>
    <dei:EntityInformationFormerLegalOrRegisteredName
      contextRef="C_e79c76c3-6bd1-4323-b9b2-ec405d215aee"
      id="F_6e65a696-5b3e-4379-b0f5-3a90703fedfc">N/A</dei:EntityInformationFormerLegalOrRegisteredName>
    <dei:WrittenCommunications
      contextRef="C_e79c76c3-6bd1-4323-b9b2-ec405d215aee"
      id="F_10562641-bf8f-4d84-9d68-45cb33609b78">false</dei:WrittenCommunications>
    <dei:SolicitingMaterial
      contextRef="C_e79c76c3-6bd1-4323-b9b2-ec405d215aee"
      id="F_32dce3dd-a3b1-4d66-8e84-718fd6e87f68">false</dei:SolicitingMaterial>
    <dei:PreCommencementTenderOffer
      contextRef="C_e79c76c3-6bd1-4323-b9b2-ec405d215aee"
      id="F_b5f46039-65d0-4358-b378-11cd09dd990f">false</dei:PreCommencementTenderOffer>
    <dei:PreCommencementIssuerTenderOffer
      contextRef="C_e79c76c3-6bd1-4323-b9b2-ec405d215aee"
      id="F_873bb12d-7180-420a-99f3-f6cfa4a88e7a">false</dei:PreCommencementIssuerTenderOffer>
    <dei:Security12bTitle
      contextRef="C_95d99d7c-98de-4906-af66-086edad9f046"
      id="F_30b4f900-4b51-43ff-8de6-4c356704fbf0">Common stock, par value $0.0001 per share</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="C_95d99d7c-98de-4906-af66-086edad9f046"
      id="F_7e1b0778-d506-4c8d-b8ab-ff40dea95ac3">ALUR</dei:TradingSymbol>
    <dei:Security12bTitle
      contextRef="C_54a88667-0528-4273-8e83-67b6954f124e"
      id="F_8181e4f3-7034-44c1-a3a8-b0ab851bd0e1">Warrants to purchase 0.00378787 shares of common stock, each at an exercise price of $3,037.50 per share of common stock</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="C_54a88667-0528-4273-8e83-67b6954f124e"
      id="F_e0962b18-4028-4be4-974a-c8316a8fb987">ALUR WS</dei:TradingSymbol>
    <dei:EntityEmergingGrowthCompany
      contextRef="C_e79c76c3-6bd1-4323-b9b2-ec405d215aee"
      id="F_b0677ec0-c968-4e73-8669-469665806f21">true</dei:EntityEmergingGrowthCompany>
    <dei:EntityExTransitionPeriod
      contextRef="C_e79c76c3-6bd1-4323-b9b2-ec405d215aee"
      id="F_aa0239c3-d39c-4ee0-8ac5-58a8040e34ec">false</dei:EntityExTransitionPeriod>
</xbrl>
