Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Mar. 26, 2024	Jun. 30, 2023
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2023
Document Transition Report	false
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, Address Line One	5 Park Plaza
Entity Address, Adress Line Two	Suite 1750
Entity Address, City or Town	Irvine
Entity Address State Or Province	CA
Entity Address, Postal Zip Code	92614
City Area Code	949
Local Phone Number	354-6499
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
ICFR Auditor Attestation Flag	false
Document Financial Statement Error Correction [Flag]	false
Entity Shell Company	false
Entity Public Float				$ 14.2
Entity Common Stock, Shares Outstanding			37,788,858
Entity Central Index Key	0001837607
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	FY
Auditor Firm ID	185	42
Auditor Name	KPMG LLP	Ernst & Young LLP
Auditor Location	San Diego, California	Irvine, California
Class A member
Title of 12(b) Security	Class A common stock, $0.0001 par value per share
Trading Symbol	AEON
Security Exchange Name	NYSEAMER
Warrants
Title of 12(b) Security	Warrants to purchase Class A common stock
Trading Symbol	AEON WS
Security Exchange Name	NYSEAMER