v3.26.1
Cover Page
Jul. 21, 2026
Entity Information [Line Items]  
Document Type 8-K
Amendment Flag false
Document Period End Date Jul. 21, 2026
Entity Central Index Key 0002102713
Entity Registrant Name Kensington Capital Acquisition Corp. VI
Entity Incorporation, State or Country Code E9
Entity File Number 001-43176
Entity Tax Identification Number 98-1901948
Entity Address, Address Line One 1400 Old Country Road
Entity Address, Address Line Two Suite 301
Entity Address, City or Town Westbury
Entity Address, State or Province NY
Entity Address, Postal Zip Code 11590
City Area Code (703)
Local Phone Number 674-6514
Written Communications true
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Emerging Growth Company true
Entity Ex Transition Period false
Units, each consisting of one Class A ordinary share, $0.0001 par value, one-quarter of one Class 1 redeemable warrant and three-quarters of one Class 2 redeemable warrant [Member]  
Entity Information [Line Items]  
Title of 12(b) Security Units, each consisting of one Class A ordinary share, $0.0001 par value, one-quarter of one Class 1 redeemable warrant and three-quarters of one
Trading Symbol KCAC.U
Security Exchange Name NYSE
Capital Unit, Class A [Member]  
Entity Information [Line Items]  
Title of 12(b) Security Class A ordinary shares, par value $0.0001 per share
Trading Symbol KCAC
Security Exchange Name NYSE
Class 1 redeemable warrants, each exercisable for one Class A ordinary share at an exercise price of $11.50 [Member]  
Entity Information [Line Items]  
Title of 12(b) Security Class 1 redeemable warrants, each exercisable for one Class A ordinary share at an exercise price of $11.50
Trading Symbol KCAC.W
Security Exchange Name NYSE
Class 2 redeemable warrants, each exercisable for one Class A ordinary share, $0.0001 par value, at an exercise price of $11.50 [Member]  
Entity Information [Line Items]  
Title of 12(b) Security Class 2 redeemable warrants, each exercisable for one Class A ordinary share, $0.0001 par value, at an exercise price of $11.50
Trading Symbol KCAC.W
Security Exchange Name NYSE
New units, each consisting of one Class A ordinary share, $0.0001 par value, and three-quarters of one Class 2 redeemable warrant [Member]  
Entity Information [Line Items]  
Title of 12(b) Security New units, each consisting of one Class A ordinary share, $0.0001 par value, and three-quarters of one Class 2 redeemable warrant
Trading Symbol KCA.U
Security Exchange Name NYSE