v3.26.1
Cover
 6 Months Ended
Mar. 31, 2026
Entity Addresses [Line Items]  
Document Type S-4
Amendment Flag false
Entity Registrant Name IB Acquisition Corp.
Entity Central Index Key 0001998781
Entity Primary SIC Number 6770
Entity Tax Identification Number 85-2946784
Entity Incorporation, State or Country Code NV
Entity Address, Address Line One 1200 N Federal Highway
Entity Address, Address Line Two Suite 215
Entity Address, City or Town Boca Raton
Entity Address, State or Province FL
Entity Address, Postal Zip Code 33432
City Area Code (214)
Local Phone Number 687-0020
Entity Filer Category Non-accelerated Filer
Entity Small Business true
Entity Emerging Growth Company true
Elected Not To Use the Extended Transition Period false
Business Contact [Member]  
Entity Addresses [Line Items]  
Entity Address, Address Line One 1200 N Federal Highway
Entity Address, Address Line Two Suite 215,
Entity Address, City or Town Boca Raton
Entity Address, State or Province FL
Entity Address, Postal Zip Code 33432
City Area Code (214)
Local Phone Number 687-0020
Contact Personnel Name I-B Good Works 4, LLC