| Cover Page | 6 Months Ended |
| Jun. 30, 2024 | |
| Document Information [Line Items] | |
| Document Type | S-1/A |
| Amendment Flag | true |
| Entity Registrant Name | ALLURION TECHNOLOGIES, INC. |
| Entity Central Index Key | 0001964979 |
| Entity Filer Category | Non-accelerated Filer |
| Entity Small Business | true |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
| Entity Incorporation, State or Country Code | DE |
| Entity Tax Identification Number | 92-2182207 |
| Entity Address, Address Line One | 11 Huron Drive |
| Entity Address, City or Town | Natick |
| Entity Address, State or Province | MA |
| Entity Address, Postal Zip Code | 01760 |
| City Area Code | 508 |
| Local Phone Number | 647-4000 |
| Entity Primary SIC Number | 3841 |
| Amendment Description | Allurion Technologies, Inc. is filing this Amendment No. 2 (this “Amendment”) to its registration statement on Form S-1 (File No. 333-279902) (as amended, the “Registration Statement”) as an exhibit-only filing. Accordingly, this Amendment consists only of the facing page, this explanatory note, Part II of the Registration Statement, the signature page to the Registration Statement and the filed exhibit. The remainder of the Registration Statement is unchanged and has therefore been omitted. |
| Business Contact | |
| Document Information [Line Items] | |
| Entity Address, Address Line One | 11 Huron Drive |
| Entity Address, City or Town | Natick |
| Entity Address, State or Province | MA |
| Entity Address, Postal Zip Code | 01760 |
| City Area Code | 508 |
| Local Phone Number | 647-4000 |
| Contact Personnel Name | Shantanu Gaur |
