Cover - shares	3 Months Ended
	Mar. 31, 2026	May 15, 2026
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	Mar. 31, 2026
Document Fiscal Year Focus	2026
Document Fiscal Period Focus	Q1
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 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 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