Cover - shares	9 Months Ended
	Sep. 30, 2025	Nov. 18, 2025
Document Information Line Items
Entity Registrant Name	Corner Growth Acquisition Corp. 2
Entity Central Index Key	0001847513
Document Type	10-Q
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Small Business	true
Entity Shell Company	true
Entity Emerging Growth Company	true
Entity Current Reporting Status	Yes
Document Period End Date	Sep. 30, 2025
Entity Filer Category	Non-accelerated Filer
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2025
Entity Ex Transition Period	false
Document Quarterly Report	true
Document Transition Report	false
Entity File Number	001-40510
Entity Incorporation State Country Code	E9
Entity Tax Identification Number	98-1582723
Entity Address Address Line 1	418 Broadway
Entity Address Address Line 2	#6592
Entity Address City Or Town	Albany
Entity Address State Or Province	NY
Entity Address Postal Zip Code	12207
City Area Code	347
Local Phone Number	268-7868
Entity Interactive Data Current	Yes
Common Class A [Member]
Document Information Line Items
Security 12b Title	Units, each consisting of one Class A ordinary share and one redeemable warrant
Class A Redeemable Ordinary Shares [Member]
Document Information Line Items
Security 12b Title	Class A Ordinary Shares, par value $0.0001 per share
Warrants [Member]
Document Information Line Items
Security 12b Title	Redeemable warrants, each exercisable for one Class A ordinary share at an exercise price of $11.50
Class A Ordinary Share [Member]
Document Information Line Items
Entity Common Stock Shares Outstanding		224,491,750
Class B Ordinary Share [Member]
Document Information Line Items
Entity Common Stock Shares Outstanding		7,500,000