v3.26.1
Cover Page - USD ($)
 12 Months Ended
Dec. 31, 2025
Mar. 27, 2026
Jun. 30, 2025
Document Information [Line Items]      
Document Type 10-K    
Amendment Flag false    
Document Annual Report true    
Document Transition Report false    
Document Period End Date Dec. 31, 2025    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2025    
Current Fiscal Year End Date --12-31    
Entity File Number 001-42998    
Entity Registrant Name Daedalus Special Acquisition Corp.    
Entity Central Index Key 0002082149    
Entity Tax Identification Number 00-0000000    
Entity Incorporation, State or Country Code E9    
Entity Address, Address Line One 50 Sloane Avenue    
Entity Address, City or Town London    
Entity Address, Country GB    
Entity Address, Postal Zip Code SW3 3DD    
City Area Code +44    
Local Phone Number 207 297 3592    
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    
Entity Ex Transition Period false    
Entity Shell Company true    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Document Financial Statement Error Correction [Flag] false    
ICFR Auditor Attestation Flag false    
Entity Public Float     $ 0
Documents Incorporated by Reference [Text Block] None    
Class A Ordinary Shares      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   25,685,000  
Class B Ordinary Shares      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   8,333,333  
Units, each consisting of one Class A ordinary share and one-fourth of one Redeemable Warrant      
Document Information [Line Items]      
Title of 12(b) Security Units, each consisting of one Class A ordinary share and one-fourth of one redeemable warrant    
Trading Symbol DSACU    
Security Exchange Name NASDAQ    
Class A ordinary share, par value $0.0001 per share      
Document Information [Line Items]      
Title of 12(b) Security Class A ordinary shares, par value $0.0001 per share    
Trading Symbol DSAC    
Security Exchange Name NASDAQ    
Warrants entitling the holder to purchase one Class A ordinary share at a price of $11.50 per share      
Document Information [Line Items]      
Title of 12(b) Security Warrants entitling the holder to purchase one Class A ordinary share at a price of $11.50 per share    
Trading Symbol DSACW    
Security Exchange Name NASDAQ