| Document and Entity Information | Jan. 24, 2024 |
| Document Information [Line Items] | |
| Document Type | 8-K |
| Document Period End Date | Jan. 24, 2024 |
| Entity Registrant Name | ESGEN ACQUISITION CORPORATION |
| Entity Incorporation State Country Code | E9 |
| Entity File Number | 001-40927 |
| Entity Tax Identification Number | 98-1601409 |
| Entity Address Address Line 1 | 5956 Sherry Lane |
| Entity Address Address Line 2 | 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 | true |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
| Entity Central Index Key | 0001865506 |
| Amendment Flag | false |
| Units, each consisting of one share of Class A ordinary share, $0.0001 par value, and one-half of one warrant redeemable warrant [Member] | |
| Document Information [Line Items] | |
| Security 12b Title | 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 |
| Class A Common Stock [Member] | |
| Document Information [Line Items] | |
| Security 12b Title | Class A ordinary shares included as part of the units |
| Trading Symbol | ESAC |
| Security Exchange Name | NASDAQ |
| Warrants included as part of the units, each whole warrant exercisable for one Class A ordinary share at an exercise price of $11.50 [Member] | |
| Document Information [Line Items] | |
| Security 12b Title | 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 |
