| Cover | Nov. 18, 2022 |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Nov. 18, 2022 |
| Entity File Number | 001-40534 |
| Entity Registrant Name | FINTECH ACQUISITION CORP. VI |
| Entity Central Index Key | 0001844336 |
| Entity Tax Identification Number | 85-3742586 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 2929 Arch Street |
| Entity Address, Address Line Two | Suite 1703 |
| Entity Address, City or Town | Philadelphia |
| Entity Address, State or Province | PA |
| Entity Address, Postal Zip Code | 19104 |
| City Area Code | 215 |
| Local Phone Number | 701-9555 |
| 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 | FTVIU |
| 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 | FTVI |
| Security Exchange Name | NASDAQ |
| Warrants, each whole warrant exercisable for one share of Class A common stock | |
| Title of 12(b) Security | Warrants, each whole warrant exercisable for one share of Class A common stock |
| Trading Symbol | FTVIW |
| Security Exchange Name | NASDAQ |
