| Cover | Aug. 08, 2023 |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Aug. 08, 2023 |
| Entity File Number | 001-41182 |
| Entity Registrant Name | Sagaliam Acquisition Corp. |
| Entity Central Index Key | 0001855351 |
| Entity Tax Identification Number | 86-3006717 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | Barry Kostiner |
| Entity Address, Address Line Two | 1800 Avenue of the Stars |
| Entity Address, Address Line Three | Suite 1475 |
| Entity Address, City or Town | Los Angeles |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 90067 |
| City Area Code | (213) |
| Local Phone Number | 616-0011 |
| 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 share of Class A common stock, par value $0.0001 per share, and right | |
| Title of 12(b) Security | Units, each consisting of one share of Class A common stock, par value $0.0001 per share, and right |
| Trading Symbol | SAGAU |
| Security Exchange Name | NASDAQ |
| Class A common stock included as part of the units | |
| Title of 12(b) Security | Class A common stock included as part of the units |
| Trading Symbol | SAGA |
| Security Exchange Name | NASDAQ |
| Rights included as part of the units | |
| Title of 12(b) Security | Rights included as part of the units |
| Trading Symbol | SAGAR |
| Security Exchange Name | NASDAQ |
