v3.26.1
Cover
Mar. 30, 2026
Document Type 8-K
Amendment Flag false
Document Period End Date Mar. 30, 2026
Current Fiscal Year End Date --12-31
Entity File Number 001-43216
Entity Registrant Name KPET Ultra Paceline Corporation
Entity Central Index Key 0002095297
Entity Tax Identification Number 98-1888520
Entity Incorporation, State or Country Code E9
Entity Address, Address Line One 5109 S. Broadband Lane
Entity Address, City or Town Sioux Falls
Entity Address, State or Province SD
Entity Address, Postal Zip Code 57108
City Area Code 605
Local Phone Number 308-0233
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, $0.0001 par value, and one-sixth of one warrant  
Title of 12(b) Security Units, each consisting of one Class A ordinary share, $0.0001 par value, and one-sixth of one warrant
Trading Symbol KPET.U
Security Exchange Name NYSE
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 KPET
Security Exchange Name NYSE
Warrants, exercisable for one Class A ordinary share at an exercise price of $11.50 per share  
Title of 12(b) Security Warrants, exercisable for one Class A ordinary share at an exercise price of $11.50 per share
Trading Symbol KPET.WS
Security Exchange Name NYSE