v3.25.2
Cover - shares
 6 Months Ended
Jun. 30, 2025
Aug. 12, 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 Jun. 30, 2025  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q2  
Entity Information [Line Items]    
Entity Registrant Name LIONHEART HOLDINGS  
Entity Central Index Key 0002015955  
Entity File Number 001-42135  
Entity Tax Identification Number 98-1778167  
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 Contact Personnel [Line Items]    
Entity Address, Address Line One 4218 NE 2nd Avenue  
Entity Address, City or Town Miami  
Entity Address, State or Province FL  
Entity Address, Postal Zip Code 33137  
Entity Phone Fax Numbers [Line Items]    
City Area Code (305)  
Local Phone Number 573-3900  
Units, each consisting of one Class A ordinary share and one-half of one redeemable warrant    
Entity Listings [Line Items]    
Title of 12(b) Security Units, each consisting of one Class A Ordinary Share and one-half of one Redeemable Warrant  
Trading Symbol CUBWU  
Security Exchange Name NASDAQ  
Class A ordinary shares, par value $0.0001 per share    
Entity Listings [Line Items]    
Title of 12(b) Security Class A Ordinary Shares, par value $0.0001 per share  
Trading Symbol CUB  
Security Exchange Name NASDAQ  
Redeemable Warrants, each whole warrant exercisable for one Class A Ordinary Share at an exercise price of $11.50    
Entity Listings [Line Items]    
Title of 12(b) Security Redeemable Warrants, each whole warrant exercisable for one Class A Ordinary Share at an exercise price of  $11.50  
Trading Symbol CUBWW  
Security Exchange Name NASDAQ  
Class A Ordinary Shares    
Entity Listings [Line Items]    
Entity Common Stock, Shares Outstanding   23,000,000
Class B Ordinary Shares    
Entity Listings [Line Items]    
Entity Common Stock, Shares Outstanding   7,666,667