v3.26.1
Cover - USD ($)
 12 Months Ended
Dec. 31, 2025
Mar. 30, 2026
Jun. 30, 2025
Document Information [Line Items]      
Document Type 10-K    
Document Annual Report true    
Document Transition Report 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 PYROPHYTE ACQUISITION CORP. II    
Entity Central Index Key 0002069238    
Entity File Number 001-42752    
Entity Tax Identification Number 00-0000000    
Entity Incorporation, State or 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    
Document Financial Statement Error Correction [Flag] false    
Entity Filer Category Non-accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company true    
Entity Ex Transition Period false    
Entity Public Float     $ 0
Entity Address, Address Line One 3262 Westheimer Road    
Entity Address, Address Line Two Suite 706    
Entity Address, City or Town Houston    
Entity Address, State or Province TX    
Entity Address, Postal Zip Code 77098    
City Area Code (281)    
Local Phone Number 701-4243    
Units, each consisting of one Class A ordinary share, $0.0001 par value, 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, $0.0001 par value, and one-half of one redeemable warrant    
Trading Symbol PAII.U    
Security Exchange Name NYSE    
Class A ordinary shares, 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 PAII    
Security Exchange Name NYSE    
Warrants, each whole warrant exercisable for one Class A ordinary share at an exercise price of $11.50 per share      
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 per share    
Trading Symbol PAII WS    
Security Exchange Name NYSE    
Class A Ordinary Shares      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   20,041,150  
Class B Ordinary Shares      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   7,225,721