| Document and Entity Information | Oct. 07, 2024 |
| Document and Entity Information [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Oct. 07, 2024 |
| Entity File Number | 001-40021 |
| Entity Registrant Name | AEON Biopharma, Inc. |
| Entity Incorporation, State or Country Code | DE |
| Entity Tax Identification Number | 85-3940478 |
| Entity Address State Or Province | CA |
| Entity Address, Address Line One | 5 Park Plaza |
| Entity Address, Adress Line Two | Suite 1750 |
| Entity Address, City or Town | Irvine |
| Entity Address, Postal Zip Code | 92614 |
| City Area Code | 949 |
| Local Phone Number | 354-6499 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Class A Common Stock, $0.0001 par value per share |
| Trading Symbol | AEON |
| Security Exchange Name | NYSEAMER |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
| Entity Central Index Key | 0001837607 |
| Amendment Flag | false |
