Cover - shares	9 Months Ended
	Sep. 30, 2023	Nov. 03, 2023
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2023
Document Transition Report	false
Entity File Number	001-40031
Entity Registrant Name	BigBear.ai Holdings, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	85-4164597
Entity Address, Address Line One	6811 Benjamin Franklin Drive
Entity Address, Address Line Two	Suite 200
Entity Address, City or Town	Columbia
Entity Address, State or Province	MD
Entity Address, Postal Zip Code	21046
City Area Code	410
Local Phone Number	312-0885
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		156,815,819
Entity Central Index Key	0001836981
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q3
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Common Stock
Document Information [Line Items]
Title of 12(b) Security	Common stock, $0.0001 par value
Trading Symbol	BBAI
Security Exchange Name	NYSE
Redeemable warrants, each full warrant exercisable for one share of common stock at an exercise price of $11.50 per share
Document Information [Line Items]
Title of 12(b) Security	Redeemable warrants, each full warrant exercisable for one share of common stock at an exercise price of $11.50 per share
Trading Symbol	BBAI.WS
Security Exchange Name	NYSE