| Cover | Feb. 16, 2024 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Feb. 16, 2024 |
| Entity File Number | 001-40188 |
| Entity Registrant Name | VECTOR ACQUISITION CORPORATION II |
| Entity Central Index Key | 0001842386 |
| Entity Tax Identification Number | 98-1575612 |
| Entity Incorporation, State or Country Code | E9 |
| Entity Address, Address Line One | One Market Street |
| Entity Address, Address Line Two | Steuart Tower |
| Entity Address, Address Line Three | 23rd Floor |
| Entity Address, City or Town | San Francisco |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 94105 |
| City Area Code | 415 |
| Local Phone Number | 293-5000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Class A Ordinary Shares |
| Trading Symbol | VAQC |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | true |
| Elected Not To Use the Extended Transition Period | false |
