v3.26.1
Cover - USD ($)
 12 Months Ended
Dec. 31, 2025
Mar. 27, 2026
Jun. 30, 2025
Document Type 10-K    
Amendment Flag false    
Document Annual Report true    
Document Transition Report false    
Document Period End Date Dec. 31, 2025    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2025    
Current Fiscal Year End Date --12-31    
Entity File Number 001-43093    
Entity Registrant Name SPACSphere Acquisition Corp.    
Entity Central Index Key 0002081300    
Entity Tax Identification Number 00-0000000    
Entity Incorporation, State or Country Code E9    
Entity Address, Address Line One 8795 Folsom Blvd    
Entity Address, City or Town Sacramento    
Entity Address, State or Province CA    
Entity Address, Postal Zip Code 95826    
City Area Code (501)    
Local Phone Number 201-0130    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Non-accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company true    
Elected Not To Use the Extended Transition Period false    
Entity Shell Company true    
Entity Public Float     $ 0
Entity Common Stock, Shares Outstanding   18,200,849  
ICFR Auditor Attestation Flag false    
Document Financial Statement Error Correction [Flag] false    
Auditor Name WithumSmith+Brown, PC    
Auditor Location New York    
Auditor Firm ID 100    
Units, each consisting of one Class A ordinary share, one-half of one redeemable warrant, and one right to receive one-fifth of one Class A ordinary share      
Title of 12(b) Security Units, each consisting of one Class A ordinary share, one-half of one redeemable warrant, and one right to receive one-fifth of one    
Trading Symbol SSACU    
Security Exchange Name NASDAQ    
Class A ordinary shares, par value $0.0001 per share      
Title of 12(b) Security Class A ordinary shares, par value $0.0001 per share    
Trading Symbol SSAC    
Security Exchange Name NASDAQ    
Redeemable warrants, each whole warrant exercisable for one Class A ordinary share at an exercise price of $11.50 per share      
Title of 12(b) Security Redeemable warrants, each whole warrant exercisable for one Class A ordinary share at an exercise price of $11.50 per share    
Trading Symbol SSACW    
Security Exchange Name NASDAQ    
Rights, each right entitling the holder to receive one-fifth (1/5) of one Class A ordinary share upon the consummation of an initial business combination      
Title of 12(b) Security Rights, each right entitling the holder to receive one-fifth (1/5) of one Class A ordinary share upon the consummation    
Trading Symbol SSACR    
Security Exchange Name NASDAQ