| Document and Entity Information | Jun. 02, 2022 |
| Document And Entity Information [Line Items] | |
| Amendment Flag | false |
| Entity Central Index Key | 0001836981 |
| Document Type | 8-K |
| Document Period End Date | Jun. 2, 2022 |
| Entity Registrant Name | BigBear.ai Holdings, Inc. |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-40031 |
| 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 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
| Common Stock Par Value 0.0001 Per Share 2 [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Common Stock, par value $0.0001 per share |
| 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 1 [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | 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 |
