| Cover | Jan. 24, 2024 |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Jan. 24, 2024 |
| Entity File Number | 001-41002 |
| Entity Registrant Name | Semper Paratus Acquisition Corporation |
| Entity Central Index Key | 0001860871 |
| Entity Incorporation, State or Country Code | E9 |
| Entity Address, Address Line One | 767 Third Avenue |
| Entity Address, Address Line Two | 38th Floor |
| Entity Address, City or Town | New York |
| Entity Address, State or Province | NY |
| Entity Address, Postal Zip Code | 10017 |
| City Area Code | (646) |
| Local Phone Number | 807-8832 |
| Written Communications | true |
| 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 Ordinary Share Par Value 0. 0001 Per Share And Onehalf Of One Redeemable Warrant [Member] | |
| Title of 12(b) Security | Units, each consisting of one Class A ordinary share, par value $0.0001 per share, and one-half of one Redeemable Warrant |
| Trading Symbol | LGSTU |
| Security Exchange Name | NASDAQ |
| Class Ordinary Shares Par Value 0. 0001 Per Share Included As Part Of Units [Member] | |
| Title of 12(b) Security | Class A ordinary shares, par value $0.0001 per share, included as part of the Units |
| Trading Symbol | LGST |
| Security Exchange Name | NASDAQ |
| Redeemable Warrants Each Exercisable For One Class Ordinary Share For 11. 50 Per Share Included As Part Of Units [Member] | |
| Title of 12(b) Security | Redeemable warrants, each exercisable for one Class A ordinary share for $11.50 per share, included as part of the Units |
| Trading Symbol | LGSTW |
| Security Exchange Name | NASDAQ |
