Introduction and Basis of Presentation	12 Months Ended
Introduction and Basis of Presentation	Dec. 31, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Introduction and Basis of Presentation [Text Block]	Introduction and Basis of Presentation Certain acronyms and terms used throughout this Annual Report are specific to Knight-Swift, commonly used in the trucking industry, or are otherwise frequently used throughout this document. Definitions for these acronyms and terms are provided in the "Glossary of Terms," available in the front of this document. Description of Business Knight-Swift is a transportation solutions provider, headquartered in Phoenix, Arizona. During 2025, the Truckload segment operated an average of 21,428 tractors (comprised of 19,395 company tractors and 2,033 independent contractor tractors). The Company operated 84,851 trailers during the year, including trailers within the Truckload segment and leasing activities within the All Other Segments. The LTL segment operated an average 4,164 tractors and 11,057 trailers. Additionally, the Intermodal segment operated an average of 595 tractors and 12,539 intermodal containers. The Company's four reportable segments are Truckload, LTL, Logistics, and Intermodal. Recent Acquisitions The Company recently completed the following acquisitions: •The operating assets, and assumption of certain liabilities, of DHE on July 30, 2024. The results are included within the LTL segment. •100.0% of U.S. Xpress on July 1, 2023. The results are included within the Truckload and Logistics segments. •100.0% of MME on December 6, 2021. The results are included within the LTL segment. •100.0% of ACT on July 5, 2021. The results are included within the LTL segment. •100.0% of UTXL on June 1, 2021. The results are included within the Logistics segment. •100.0% of Eleos, 79.44% on February 1, 2021 and the remaining percentage in 2024. The results are included within the All Other Segments. The noncontrolling interest is presented as a separate component of the consolidated financial statements. Note regarding comparability: In accordance with the accounting treatment applicable to the transactions, the Company's consolidated results, as reported, do not include the operating results of its ownership interest in the acquired entities prior to the respective acquisition dates. Accordingly, comparisons between the Company's current and prior period results may not be meaningful. Additional information regarding the Company's recent acquisitions is included in Note 4. Basis of Presentation The consolidated financial statements include the accounts of Knight-Swift Transportation Holdings Inc. and its subsidiaries. In management's opinion, these consolidated financial statements were prepared in accordance with GAAP and include all adjustments necessary (consisting of normal recurring adjustments) for the fair presentation of the periods presented. With respect to transactional/durational data, references to "years", including "2025", "2024", and "2023" pertain to calendar years. Similarly, references to "quarters", including "first", "second", "third", and "fourth" pertain to calendar quarters. Changes in Presentation Consolidated Statements of Cash Flows — Beginning in the fourth quarter of 2024, the Company presents gross borrowings on its revolving lines of credit and gross repayments on its revolving lines of credit as separate items. Prior period amounts have been reclassified to align with the current period presentation. Seasonality In the full truckload transportation industry, results of operations generally follow a seasonal pattern. Freight volumes in the first quarter are typically lower due to less consumer demand, customers reducing shipments following the holiday season, and inclement winter weather. At the same time, operating expenses generally increase, and tractor productivity of the Company's Truckload fleet, independent contractors, and third-party carriers decreases during the winter months due to decreased fuel efficiency, increased cold-weather-related equipment maintenance and repairs, and increased insurance claims and costs attributed to higher accident frequency from harsh weather. These factors typically lead to lower operating profitability, as compared to other parts of the year. Additionally, beginning in the latter half of the third quarter and continuing into the fourth quarter, the Company typically experiences surges pertaining to holiday shopping trends toward delivery of gifts purchased over the Internet as well as the length of the holiday season (consumer shopping days between Thanksgiving and Christmas). However, as the Company continues to diversify its business through expansion into the LTL industry, warehousing, and other activities, seasonal volatility has become somewhat more tempered. Additionally, macroeconomic trends and cyclical changes in the trucking industry, including imbalances in supply and demand, can override the seasonality faced in the industry. Recently Adopted Accounting Pronouncements ASU 2023-09: Income Taxes (Topic 740) — Improvements to Income Tax Disclosure Summary of the Standard — The amendments in the ASU update disclosure requirements related to income taxes including disclosures related to the rate reconciliation, income taxes paid, and other items. Current Period Impact of Adoption — In accordance with ASU 2023-09 the Company has expanded its income tax disclosures, on a prospective basis, to provide more description into the components of the Company's effective tax rate, income taxes paid, and other items. Refer to Note 2 and Note 11 for updated disclosures about the Company's treatment of income taxes.

Knight-Swift Transportation Holdings Inc. 10-K