Cover - shares	9 Months Ended
Cover - shares	Sep. 30, 2025	Nov. 14, 2025
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	Sep. 30, 2025
Document Fiscal Year Focus	2025
Document Fiscal Period Focus	Q3
Entity Information [Line Items]
Entity Registrant Name	SILVER PEGASUS ACQUISITION CORP.
Entity Central Index Key	0002028735
Entity File Number	001-42743
Entity Tax Identification Number	98-1795957
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 Incorporation, Date of Incorporation	Jun. 05, 2024
Entity Contact Personnel [Line Items]
Entity Address, Address Line One	2455 Augustine Dr
Entity Address, Address Line Two	STE 150
Entity Address, City or Town	Santa Clara
Entity Address, Country	CA
Entity Address, Postal Zip Code	95054
Entity Phone Fax Numbers [Line Items]
City Area Code	(408)
Local Phone Number	734-6022
Units, each consisting of one Class A ordinary share and one Right
Entity Listings [Line Items]
Title of 12(b) Security	Units, each consisting of one Class A ordinary share and one Right
Trading Symbol	SPEGU
Security Exchange Name	NASDAQ
Class A ordinary share, par value $0.0001 per share
Entity Listings [Line Items]
Title of 12(b) Security	Class A ordinary share, par value $0.0001 per share
Trading Symbol	SPEG
Security Exchange Name	NASDAQ
Right - each right entitles the holder thereof to receive one-tenth (1/10) of one Class A ordinary share
Entity Listings [Line Items]
Title of 12(b) Security	Right - each right entitles the holder thereof to receive one-tenth (1/10) of one Class A ordinary share
Trading Symbol	SPEGR
Security Exchange Name	NASDAQ
Class A Ordinary Shares
Entity Listings [Line Items]
Entity Common Stock, Shares Outstanding		11,500,000
Class B Ordinary Shares
Entity Listings [Line Items]
Entity Common Stock, Shares Outstanding		3,833,333

Silver Pegasus Acquisition Corp. 10-Q