v3.25.1
Cover - shares
 3 Months Ended
Mar. 31, 2025
May 08, 2025
Document Information [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Transition Report false  
Entity Interactive Data Current Yes  
Amendment Flag false  
Document Period End Date Mar. 31, 2025  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q1  
Entity Information [Line Items]    
Entity Registrant Name JACKSON ACQUISITION COMPANY II  
Entity Central Index Key 0002039058  
Entity File Number 001-42432  
Entity Tax Identification Number 98-1810786  
Entity Incorporation, State or Country Code E9  
Current Fiscal Year End Date --12-31  
Entity Current Reporting Status Yes  
Entity Shell Company true  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Entity Incorporation, Date of Incorporation Sep. 11, 2024  
Entity Contact Personnel [Line Items]    
Entity Address, Address Line One 2655 Northwinds Parkway  
Entity Address, City or Town Alpharetta  
Entity Address, Country GA  
Entity Address, Postal Zip Code 30009  
Entity Phone Fax Numbers [Line Items]    
City Area Code (770)  
Local Phone Number 643-5605  
Units, each consisting of one Class A ordinary share and one right to acquire one-tenth (1/10) of one Class A ordinary share    
Entity Listings [Line Items]    
Title of 12(b) Security Units, each consisting of one Class A ordinary share and one right to acquire one-tenth (1/10) of one Class A ordinary share  
Trading Symbol JACS.U  
Security Exchange Name NYSE  
Class A ordinary share, par value $0.0001 per share    
Entity Listings [Line Items]    
Title of 12(b) Security Class A ordinary share, par value $0.0001 per share  
Trading Symbol JACS  
Security Exchange Name NYSE  
Rights, each right to acquire one-tenth (1/10) of one Class A ordinary share    
Entity Listings [Line Items]    
Title of 12(b) Security Rights, each right to acquire one-tenth (1/10) of one Class A ordinary share  
Trading Symbol JACS.R  
Security Exchange Name NYSE  
Class A Ordinary Shares    
Entity Listings [Line Items]    
Entity Common Stock, Shares Outstanding   23,840,000
Class B Ordinary Shares    
Entity Listings [Line Items]    
Entity Common Stock, Shares Outstanding   5,750,000