v3.25.4
Document and Entity Information
Mar. 03, 2026
Document And Entity Information [Line Items]  
Amendment Flag false
Entity Central Index Key 0002102713
Current Fiscal Year End Date --12-31
Document Type 8-K
Document Period End Date Mar. 03, 2026
Entity Registrant Name KENSINGTON CAPITAL ACQUISITION CORP. VI
Entity Incorporation State 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 false
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]  
Document And Entity Information [Line Items]  
Security 12b Title 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]  
Document And Entity Information [Line Items]  
Security 12b Title Class A ordinary shares, $0.0001 par value
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]  
Document And Entity Information [Line Items]  
Security 12b Title 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 At An Exercise Price Of 11.50 [Member]  
Document And Entity Information [Line Items]  
Security 12b Title Class 2 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
New Units Each Consisting Of One Class A Ordinary Share 0.0001 Par Value And One Class 2 Redeemable Warrant [Member]  
Document And Entity Information [Line Items]  
Security 12b Title New units, each consisting of one Class A ordinary share, $0.0001 par value and one Class 2 redeemable warrant
Trading Symbol KCA.U
Security Exchange Name NYSE