| Cover | Apr. 26, 2024 |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Apr. 26, 2024 |
| Entity File Number | 001-40123 |
| Entity Registrant Name | Twelve Seas Investment Co. II |
| Entity Central Index Key | 0001819498 |
| Entity Tax Identification Number | 85-2141273 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 228 Park Avenue S. |
| Entity Address, Address Line Two | Suite 89898 |
| Entity Address, City or Town | New York |
| Entity Address, State or Province | NY |
| Entity Address, Postal Zip Code | 00000 |
| City Area Code | 917 |
| Local Phone Number | 361-1177 |
| 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 and one-third of one Redeemable Warrant | |
| Title of 12(b) Security | Units, each consisting of one share of Class A Common Stock and one-third of one Redeemable Warrant |
| Trading Symbol | TWLVU |
| Security Exchange Name | NASDAQ |
| Class A Common Stock, par value $0.0001 per share | |
| Title of 12(b) Security | Class A Common Stock, par value $0.0001 per share |
| Trading Symbol | TWLV |
| Security Exchange Name | NASDAQ |
| Redeemable warrants, each whole warrant exercisable for one share of Class A Common Stock for $11.50 per share | |
| Title of 12(b) Security | Redeemable warrants, each whole warrant exercisable for one share of Class A Common Stock for $11.50 per share |
| Trading Symbol | TWLVW |
| Security Exchange Name | NASDAQ |
