Fair Value of Financial Assets and Liabilities - Schedule of Fair Value of Warrants Issued (Parenthetical) (Details) - $ / shares	12 Months Ended
	Dec. 31, 2021	Jul. 16, 2021		Dec. 31, 2020
Dragasac Warrant
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Exercise price	$ 6.77	$ 6.77	[1]	$ 6.77	[1]
Percentage of exercise price	80.00%
Exercise price, description	(i) the value attributed to one share of Legacy Celularity Series B Preferred Stock upon a consummation of a change of control or the closing of a strategic transaction or (ii) the price at which one share of Legacy Celularity common stock is sold to the public in an initial public offering. As amended on March 16, 2020, the warrants are exercisable on the first to occur of (a) March 16, 2025, (b) the consummation of Legacy Celularity’s initial public offering, (c) the consummation of a change of control and (d) the closing of a strategic transaction pursuant to which Legacy Celularity’s stockholders exchange their existing shares of capital stock in Legacy Celularity for shares in a company whose shares are listed on a national stock exchange.
Series B Preferred Stock
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Exercise price	$ 7.53	$ 7.53	[2]	$ 7.53	[2]

[1] The exercise price is the lower of $6.77 per share or 80% of either (i) the value attributed to one share of Legacy Celularity Series B Preferred Stock upon a consummation of a change of control or the closing of a strategic transaction or (ii) the price at which one share of Legacy Celularity common stock is sold to the public in an initial public offering. As amended on March 16, 2020, the warrants are exercisable on the first to occur of (a) March 16, 2025, (b) the consummation of Legacy Celularity’s initial public offering, (c) the consummation of a change of control and (d) the closing of a strategic transaction pursuant to which Legacy Celularity’s stockholders exchange their existing shares of capital stock in Legacy Celularity for shares in a company whose shares are listed on a national stock exchange.

[2] The warrants are exercisable at a price of $7.53 per share on the first to occur of: (a) the 60-month anniversary of the date of issuance of the warrants, (b) the consummation of an agreement for a public exit event, and (c) the consummation of a change of control.