| Document and Entity Information | Feb. 16, 2023 |
| Document And Entity Information [Line Items] | |
| Entity Registrant Name | Kadem Sustainable Impact Corp |
| Amendment Flag | false |
| Entity Central Index Key | 0001843351 |
| Document Type | 8-K |
| Document Period End Date | Feb. 16, 2023 |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-40224 |
| Entity Tax Identification Number | 86-1306839 |
| Entity Address, Address Line One | 30 Broad Street |
| Entity Address, Address Line Two | 14th Floor |
| Entity Address, City or Town | New York |
| Entity Address, State or Province | NY |
| Entity Address, Postal Zip Code | 10004 |
| City Area Code | (917) |
| Local Phone Number | 841-6202 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
| Units Each Consisting Of One Share Of Class A Common Stock And One Half Of One Warrant [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Units, each consisting of one share of Class A common stock and one-half of one warrant |
| Trading Symbol | KSICU |
| Security Exchange Name | NASDAQ |
| Common Stock [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Class A common stock, par value $0.0001 per share |
| Trading Symbol | KSI |
| Security Exchange Name | NASDAQ |
| Warrants Each Whole Warrant Exercisable For One Share Of Class A Common Stock At An Exercise Price Of 11.50 Per Share [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Warrants, each whole warrant exercisable for one share of Class A common stock at an exercise price of $11.50 per share |
| Trading Symbol | KSICW |
| Security Exchange Name | NASDAQ |
