v3.25.2
Document and Entity Information Document
Jul. 08, 2025
Cover [Abstract]  
Document Type 8-K
Document Period End Date Jul. 08, 2025
Entity Registrant Name Knight-Swift Transportation Holdings Inc.
Entity Incorporation, State or Country Code DE
Entity File Number 001-35007
Entity Tax Identification Number 20-5589597
Entity Address, Address Line One 2002 West Wahalla Lane
Entity Address, City or Town Phoenix
Entity Address, State or Province AZ
Entity Address, Postal Zip Code 85027
City Area Code 602
Local Phone Number 269-2000
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common Stock $0.01 Par Value
Trading Symbol KNX
Security Exchange Name NYSE
Entity Emerging Growth Company false
Entity Central Index Key 0001492691
Amendment Flag false