Cover - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Apr. 06, 2025	Jun. 30, 2024
Document Type	10-K
Amendment Flag	false
Document Annual Report	true
Document Transition Report	false
Document Period End Date	Dec. 31, 2024
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2024
Current Fiscal Year End Date	--12-31
Entity File Number	001-38914
Entity Registrant Name	Celularity Inc.
Entity Central Index Key	0001752828
Entity Tax Identification Number	83-1702591
Entity Incorporation, State or Country Code	DE
Entity Address, Address Line One	170 Park Ave
Entity Address, City or Town	Florham Park
Entity Address, State or Province	NJ
Entity Address, Postal Zip Code	07932
City Area Code	(908)
Local Phone Number	768-2170
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	false
Entity Shell Company	false
Entity Public Float				$ 38.5
Entity Common Stock, Shares Outstanding			23,949,229
Documents Incorporated by Reference [Text Block]	None
ICFR Auditor Attestation Flag	false
Document Financial Statement Error Correction [Flag]	false
Auditor Firm ID	274	34
Auditor Opinion [Text Block]	We have audited the accompanying consolidated balance sheet of Celularity Inc. (the “Company”) as of December 31, 2024 and the related consolidated statements of operations and comprehensive loss, stockholders’ equity, and cash flows for the year then ended, and the related notes (collectively referred to as the “financial statements”). In our opinion, the financial statements present fairly, in all material respects, the consolidated financial position of the Company as of December 31, 2024, and the consolidated results of its operations and its cash flows for the year then ended, in conformity with accounting principles generally accepted in the United States of America.
Auditor Name	EisnerAmper LLP	Deloitte & Touche LLP
Auditor Location	Iselin, New Jersey	Morristown, New Jersey
Class A common stock, par value $0.0001 per share
Title of 12(b) Security	Class A common stock, par value $0.0001 per share
Trading Symbol	CELU
Security Exchange Name	NASDAQ
Warrants, each exercisable for one share of Class A common stock at an exercise price of $115 per share
Title of 12(b) Security	Warrants, each exercisable for one share of Class A common stock at an exercise price of $115 per share
Trading Symbol	CELUW
Security Exchange Name	NASDAQ