Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2026	May 31, 2026
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Mar. 31, 2026
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2026
Document Fiscal Period Focus	Q1
Entity File Number	001-43256
Entity Registrant Name	Pershing Square Inc.
Entity Central Index Key	0002026053
Amendment Flag	false
Entity Incorporation, State or Country Code	NV
Entity Tax Identification Number	99-2840341
Entity Address, Address Line One	787 Eleventh Avenue
Entity Address, Address Line Two	Ninth Floor
Entity Address, City or Town	New York
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	10019
City Area Code	212
Local Phone Number	813-3700
Title of 12(b) Security	Common Stock
Trading Symbol	PS
Security Exchange Name	NYSE
Entity Current Reporting Status	No
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		400,000,000