v3.26.1
Cover - USD ($)
 12 Months Ended
Dec. 31, 2025
Mar. 23, 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    
Documents Incorporated by Reference [Text Block] None    
Entity Registrant Name INFLECTION POINT ACQUISITION CORP. V    
Entity Central Index Key 0002028355    
Entity File Number 001-42518    
Entity Tax Identification Number 00-0000000    
Entity Incorporation State 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     $ 87,026,250
Entity Address Address Line 1 167 Madison Ave    
Entity Address Address Line 2 Suite 205 #1017    
Entity Address City Or Town New York    
Entity Address State Or Province NY    
Entity Address Postal Zip Code 10016    
City Area Code (212)    
Local Phone Number 476-6908    
Class A Ordinary Shares      
Document Information [Line Items]      
Entity Common Stock Shares Outstanding   10,919,375  
Class B Ordinary Shares      
Document Information [Line Items]      
Entity Common Stock Shares Outstanding   990,000  
Units, each consisting of one Class A ordinary share and one right      
Document Information [Line Items]      
Security 12b Title Units, each consisting of one Class A ordinary share and one right    
Trading Symbol IPEXU    
Security Exchange Name NASDAQ    
Class A Ordinary Shares, par value $0.0001 per share      
Document Information [Line Items]      
Security 12b Title Class A Ordinary Shares, par value $0.0001 per share    
Trading Symbol IPEX    
Security Exchange Name NASDAQ    
Rights, each entitling the holder to one-fifth (1/5) of one Class A ordinary share upon the completion of the Company’s initial business combination      
Document Information [Line Items]      
Security 12b Title Rights, each entitling the holder to one-fifth (1/5) of one Class A    
Trading Symbol IPEXR    
Security Exchange Name NASDAQ