v3.26.1

Cover - shares	9 Months Ended
Cover - shares	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	Q3
Entity Registrant Name	Westin Acquisition Corp.
Entity Central Index Key	0002076192
Entity File Number	001-42926
Entity Tax Identification Number	00-0000000
Entity Address, Address Line One	Suite 1165-L
Entity Address, Address Line Two	3 Coleman Street #03-24
Entity Address, City or Town	Singapore
Entity Address, Country	SG
Entity Address, Postal Zip Code	179804
Entity Incorporation, State or Country Code	E9
Current Fiscal Year End Date	--06-30
Entity Current Reporting Status	Yes
City Area Code	+65
Local Phone Number	9488 4425
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 Common Stock, Shares Outstanding		8,055,000
Units, each consisting of one Class A, ordinary share, par value $0.0001, and one right entitling the holder to receive one-sixth (1/6) of one Class A ordinary share
Document Information [Line Items]
Title of 12(b) Security	Units, each consisting of one Class A, ordinary share, par value $0.0001, and one right entitling the holder to receive one-sixth (1/6)
Trading Symbol	WSTNU
Security Exchange Name	NASDAQ
Class A ordinary shares, $0.0001 par value
Document Information [Line Items]
Title of 12(b) Security	Class A ordinary shares, $0.0001 par value
Trading Symbol	WSTN
Security Exchange Name	NASDAQ
Rights to receive one-sixth (1/6) of one Class A ordinary share
Document Information [Line Items]
Title of 12(b) Security	Rights to receive one-sixth (1/6) of one Class A ordinary share
Trading Symbol	WSTNR
Security Exchange Name	NASDAQ

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Westin Acquisition Corp 10-Q