v3.26.1
Cover - shares
6 Months Ended
Jun. 30, 2026
Aug. 14, 2026
Document Type 10-Q  
Amendment Flag false  
Document Quarterly Report true  
Document Transition Report false  
Document Period End Date Jun. 30, 2026  
Document Fiscal Period Focus Q2  
Document Fiscal Year Focus 2026  
Current Fiscal Year End Date --12-31  
Entity File Number 001-43293  
Entity Registrant Name BERTO ACQUISITION CORP. II  
Entity Central Index Key 0002081515  
Entity Tax Identification Number 99-1894162  
Entity Incorporation, State or Country Code E9  
Entity Address, Address Line One 1180 North Town Center Drive  
Entity Address, Address Line Two Suite 100  
Entity Address, City or Town Las Vegas  
Entity Address, State or Province NV  
Entity Address, Postal Zip Code 89144  
City Area Code (702)  
Local Phone Number 781-4313  
Entity Current Reporting Status No  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company true  
Elected Not To Use the Extended Transition Period false  
Entity Shell Company true  
Entity Common Stock, Shares Outstanding   39,387,500
Units, consisting of one ordinary share, $0.0001 par value, and one-half of one redeemable warrant    
Title of 12(b) Security Units, each consisting of one ordinary share, $0.0001 par value, and one-third of one redeemable warrant  
Trading Symbol GUACU  
Security Exchange Name NASDAQ  
Ordinary shares, par value $0.0001 per share    
Title of 12(b) Security Ordinary shares, par value $0.0001 per share  
Trading Symbol GUAC  
Security Exchange Name NASDAQ  
Warrants entitling the holder to purchase one ordinary share, par value $0.0001 per share    
Title of 12(b) Security Warrants, each whole warrant exercisable for one ordinary share at an exercise price of $11.50 per share  
Trading Symbol GUACW  
Security Exchange Name NASDAQ