v3.26.1
Document And Entity Information - shares
 6 Months Ended
Jun. 30, 2026
Aug. 12, 2026
Document Information Line Items    
Entity Central Index Key 0002084563  
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2026  
Document Fiscal Year Focus 2026  
Document Transition Report false  
Entity File Number 001-42993  
Entity Registrant Name Leapfrog Acquisition Corporation  
Entity Incorporation, State or Country Code E9  
Entity Tax Identification Number 00-0000000  
Entity Address, Address Line One 350 Springfield Avenue  
Entity Address, Address Line Two Suite 200 Summit  
Entity Address, State or Province NJ  
Entity Address, City or Town New Jersey  
Entity Address, Postal Zip Code 07901  
City Area Code 201  
Local Phone Number 379-4200  
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  
Amendment Flag false  
Document Fiscal Period Focus Q2  
Current Fiscal Year End Date --12-31  
Units, each consisting of one Class A ordinary share and one-half of one redeemable warrant    
Document Information 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 LFACU  
Security Exchange Name NASDAQ  
Class A Ordinary Shares    
Document Information Line Items    
Title of 12(b) Security Class A ordinary shares, par value $0.0001 per share  
Trading Symbol LFAC  
Security Exchange Name NASDAQ  
Entity Common Stock, Shares Outstanding   14,847,500
Warrants, each whole warrant exercisable for one Class A ordinary share at an exercise price of $11.50    
Document Information Line Items    
Title of 12(b) Security Warrants, each whole warrant exercisable for one Class A ordinary share at an exercise price of $11.50  
Trading Symbol LFACW  
Security Exchange Name NASDAQ  
Class B Ordinary Shares    
Document Information Line Items    
Entity Common Stock, Shares Outstanding   4,791,667