| Cover | Sep. 14, 2023 |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Sep. 14, 2023 |
| Current Fiscal Year End Date | --12-31 |
| Entity File Number | 001-40206 |
| Entity Registrant Name | CF ACQUISITION CORP. VIII |
| Entity Central Index Key | 0001839530 |
| Entity Tax Identification Number | 85-2002883 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 110 East 59th Street |
| Entity Address, City or Town | New York |
| Entity Address, State or Province | NY |
| Entity Address, Postal Zip Code | 10022 |
| City Area Code | (212) |
| Local Phone Number | 938-5000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Elected Not To Use the Extended Transition Period | false |
| Units, each consisting of one share of Class A common stock and one-fourth of one redeemable warrant | |
| Title of 12(b) Security | Units, each consisting of one share of Class A common stock and one-fourth of one redeemable warrant |
| Trading Symbol | CFFEU |
| Security Exchange Name | NASDAQ |
| 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 | CFFE |
| Security Exchange Name | NASDAQ |
| Redeemable warrants, exercisable for one share of Class A common stock at an exercise price of $11.50 per share | |
| Title of 12(b) Security | Redeemable warrants, exercisable for one share of Class A common stock at an exercise price of $11.50 per share |
| Trading Symbol | CFFEW |
| Security Exchange Name | NASDAQ |
