| Cover | Dec. 13, 2021 |
| Document Information [Line Items] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Dec. 13, 2021 |
| Entity File Number | 001-40927 |
| Entity Registrant Name | ESGEN Acquisition Corporation |
| Entity Central Index Key | 0001865506 |
| Entity Tax Identification Number | 98-1601409 |
| Entity Incorporation, State or Country Code | E9 |
| Entity Address, Address Line One | 5956 Sherry Lane |
| Entity Address, Address Line Two | Suite 1400 |
| Entity Address, City or Town | Dallas |
| Entity Address, State or Province | TX |
| Entity Address, Postal Zip Code | 75225 |
| City Area Code | 214 |
| Local Phone Number | 987-6100 |
| 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 Class A ordinary share, $0.0001 par value, and one-half of one redeemable warrant [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Units, each consisting of one Class A ordinary share, $0.0001 par value, and one-half of one redeemable warrant |
| Trading Symbol | ESACU |
| Security Exchange Name | NASDAQ |
| Common Class A [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Class A ordinary shares included as part of the units |
| Trading Symbol | ESAC |
| Security Exchange Name | NASDAQ |
| Warrant [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Warrants included as part of the units, each whole warrant exercisable for one Class A ordinary share at an exercise price of $11.50 |
| Trading Symbol | ESACW |
| Security Exchange Name | NASDAQ |
