| Cover | Sep. 19, 2024 |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Sep. 19, 2024 |
| Entity File Number | 001-42280 |
| Entity Registrant Name | CAYSON ACQUISITION CORP |
| Entity Central Index Key | 0002024203 |
| Entity Incorporation, State or Country Code | E9 |
| Entity Address, Address Line One | 420 Lexington Ave |
| Entity Address, Address Line Two | Suite 2446 |
| Entity Address, City or Town | New York |
| Entity Address, State or Province | NY |
| Entity Address, Postal Zip Code | 10170 |
| City Area Code | (203) |
| Local Phone Number | 998-5540 |
| 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 ordinary share and one right | |
| Title of 12(b) Security | Units, each consisting of one ordinary share and one right |
| Trading Symbol | CAPNU |
| Security Exchange Name | NASDAQ |
| Ordinary Shares, par value $0.0001 per share | |
| Title of 12(b) Security | Ordinary Shares, par value $0.0001 per share |
| Trading Symbol | CAPN |
| Security Exchange Name | NASDAQ |
| Rights, each entitling the holder to one tenth of one ordinary share upon the completion of the Companys initial business combination | |
| Title of 12(b) Security | Rights, each entitling the holder to one tenth of one ordinary share upon the completion of the Company’s initial business combination |
| Trading Symbol | CAPNR |
| Security Exchange Name | NASDAQ |
