v3.26.1
Cover
Jun. 12, 2026
Document Type 8-K
Amendment Flag false
Document Period End Date Jun. 12, 2026
Entity File Number 001-43255
Entity Registrant Name Collective Acquisition Corp. II
Entity Central Index Key 0002115404
Entity Tax Identification Number 98-1924367
Entity Incorporation, State or Country Code E9
Entity Address, Address Line One 1000 Brickell Avenue
Entity Address, Address Line Two Ste 715 PMB 5110
Entity Address, City or Town Miami
Entity Address, State or Province FL
Entity Address, Postal Zip Code 33131
City Area Code 561
Local Phone Number 489-2062
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Emerging Growth Company true
Elected Not To Use the Extended Transition Period false
Units, each consisting of one Class A ordinary share and one-half of one redeemable warrant  
Title of 12(b) Security Units, each consisting of one Class A ordinary share and one-half of one redeemable warrant
Trading Symbol CAIIU
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 CAII
Security Exchange Name NASDAQ
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 Warrants, each whole warrant exercisable for one Class A ordinary share at an exercise price of $11.50 per share
Trading Symbol CAIIW
Security Exchange Name NASDAQ