| Cover Page | Jul. 12, 2023 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Jul. 12, 2023 |
| Entity Registrant Name | Fisker Inc./DE |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-38625 |
| Entity Tax Identification Number | 82-3100340 |
| Entity Address, Address Line One | 1888 Rosecrans Avenue |
| Entity Address, City or Town | Manhattan Beach |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 90266 |
| City Area Code | 833 |
| Local Phone Number | 434-7537 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Class A Common Stock, par value of $0.00001 per share |
| Trading Symbol | FSR |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0001720990 |
| Amendment Flag | false |
