XML 12 R1.htm IDEA: XBRL DOCUMENT v3.26.1
Cover - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Mar. 19, 2026
Jun. 30, 2025
Document Information [Line Items]      
Document Type 10-K    
Document Annual Report true    
Document Transition Report false    
Document Financial Statement Error Correction [Flag] false    
Entity Interactive Data Current Yes    
ICFR Auditor Attestation Flag false    
Amendment Flag false    
Document Period End Date Dec. 31, 2025    
Document Fiscal Year Focus 2025    
Document Fiscal Period Focus FY    
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 Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
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 Public Float     $ 240.5
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