Cover - USD ($)	12 Months Ended
	Nov. 30, 2025	Feb. 12, 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	Nov. 30, 2025
Document Fiscal Year Focus	2025
Document Fiscal Period Focus	FY
Documents Incorporated by Reference [Text Block]	None
Entity Registrant Name	IRON HORSE ACQUISITION II CORP.
Entity Central Index Key	0002051985
Entity File Number	001-41699
Entity Tax Identification Number	98-1885362
Entity Incorporation, State or Country Code	E9
Current Fiscal Year End Date	--11-30
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			$ 0
Entity Address, Address Line One	851 Broken Sound Parkway NW
Entity Address, Address Line Two	Suite 230
Entity Address, City or Town	Boca Raton
Entity Address, State or Province	FL
Entity Address, Postal Zip Code	33487
City Area Code	(310)
Local Phone Number	290-5383
Entity Common Stock, Shares Outstanding		29,320,000
Units, each consisting of one ordinary share and one right
Document Information [Line Items]
Title of 12(b) Security	Units, each consisting of one ordinary share and one right
Trading Symbol	IRHOU
Security Exchange Name	NASDAQ
Ordinary Share, par value $0.0001 per share
Document Information [Line Items]
Title of 12(b) Security	Ordinary Share, par value $0.0001 per share
Trading Symbol	IRHO
Security Exchange Name	NASDAQ
Right-each right entitles the holder thereof to receive one-tenth (1/10) of an ordinary share
Document Information [Line Items]
Title of 12(b) Security	Right-each right entitles the holder thereof to receive one-tenth (1/10) of an ordinary share
Trading Symbol	IRHOR
Security Exchange Name	NASDAQ