v3.24.1.1.u2
Cover - $ / shares
3 Months Ended
Mar. 31, 2024
May 16, 2024
Document Type 10-Q  
Amendment Flag false  
Document Quarterly Report true  
Document Transition Report false  
Document Period End Date Mar. 31, 2024  
Document Fiscal Period Focus Q1  
Document Fiscal Year Focus 2024  
Current Fiscal Year End Date --12-31  
Entity Registrant Name ONYX ACQUISITION CO. I  
Entity Central Index Key 0001849548  
Entity Tax Identification Number 98-1584432  
Entity Incorporation, State or Country Code E9  
Entity Address, Address Line One 104 5th Avenue  
Entity Address, City or Town New York  
Entity Address, State or Province NY  
Entity Address, Postal Zip Code 10011  
City Area Code (212)  
Local Phone Number 974-2844  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company true  
Elected Not To Use the Extended Transition Period false  
Entity Shell Company true  
Entity Common Stock, Shares Outstanding   7,945,461
Entity Listing, Par Value Per Share $ 0.0001  
Units Each Consisting Of One Class Ordinary Share 0. 0001 Par Value And Onehalf Of One Redeemable Warrant [Member]    
Title of 12(b) Security Units, each consisting of one Class A Ordinary Share, $0.0001 par value  
Trading Symbol ONYXU  
Security Exchange Name NASDAQ  
Class Ordinary Shares [Member]    
Title of 12(b) Security Class A Ordinary Shares  
Trading Symbol ONYX  
Security Exchange Name NASDAQ  
Redeemable Warrants Each Whole Warrant Exercisable For One Class Ordinary Share At Exercise Price Of 11. 50 [Member]    
Title of 12(b) Security Redeemable warrants, each whole warrant exercisable for one Class A Ordinary Share  
Trading Symbol ONYXW  
Security Exchange Name NASDAQ