Document And Entity Information - shares	6 Months Ended
	Jun. 30, 2021	Aug. 11, 2021
Document Information Line Items
Entity Registrant Name	CELULARITY INC.
Trading Symbol	CELU
Document Type	10-Q
Current Fiscal Year End Date	--12-31
Entity Common Stock, Shares Outstanding		123,464,113
Amendment Flag	false
Entity Central Index Key	0001752828
Entity Current Reporting Status	Yes
Entity Filer Category	Non-accelerated Filer
Document Period End Date	Jun. 30, 2021
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q2
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Shell Company	true
Entity Ex Transition Period	false
Document Quarterly Report	true
Document Transition Report	false
Entity File Number	001-38914
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	83-1702591
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	(609)
Local Phone Number	235-1010
Title of 12(b) Security	Class A Common Stock, $0.0001 par value per share
Security Exchange Name	NASDAQ
Entity Interactive Data Current	Yes