Introduction and Basis of Presentation	3 Months Ended
Mar. 31, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Introduction and Basis of Presentation	Introduction and Basis of Presentation Certain acronyms and terms used throughout this Quarterly Report are specific to the Company, 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 the quarter ended March 31, 2025, the Company operated an average of 21,909 tractors (comprised of 19,840 company tractors and 2,069 independent contractor tractors) and 89,567 trailers within the Truckload segment and leasing activities within the All Other Segments. The LTL segment operated an average of 4,023 tractors and 10,976 trailers. Additionally, the Intermodal segment operated an average of 622 tractors and 12,546 intermodal containers. As of March 31, 2025, the Company's four reportable segments were Truckload, LTL, Logistics, and Intermodal. Basis of Presentation The condensed consolidated financial statements and footnotes included in this Quarterly Report include the accounts of Knight-Swift Transportation Holdings Inc. and its subsidiaries and should be read in conjunction with the consolidated financial statements and footnotes included in Knight-Swift's 2024 Annual Report. In management's opinion, these condensed consolidated financial statements were prepared in accordance with GAAP and include all adjustments necessary (consisting of normal recurring adjustments) for the fair statement of the periods presented. With respect to transactional/durational data, references to years pertain to calendar years. Similarly, references to quarters pertain to calendar quarters. Note regarding comparability — The reported results do not include the LTL operations of DHE prior to its acquisition by the Company on July 30, 2024 in accordance with the accounting treatment applicable to the transaction. Accordingly, comparisons between the Company's current and prior period results may not be meaningful. 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 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 is becoming 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.

Certain acronyms and terms used throughout this Quarterly Report are specific to the Company, 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.

Knight-Swift is a transportation solutions provider, headquartered in Phoenix, Arizona. During the quarter ended March 31, 2025, the Company operated an average of 21,909 tractors (comprised of 19,840 company tractors and 2,069 independent contractor tractors) and 89,567 trailers within the Truckload segment and leasing activities within the All Other Segments. The LTL segment operated an average of 4,023 tractors and 10,976 trailers. Additionally, the Intermodal segment operated an average of 622 tractors and 12,546 intermodal containers. As of March 31, 2025, the Company's four reportable segments were Truckload, LTL, Logistics, and Intermodal.

The condensed consolidated financial statements and footnotes included in this Quarterly Report include the accounts of Knight-Swift Transportation Holdings Inc. and its subsidiaries and should be read in conjunction with the consolidated financial statements and footnotes included in Knight-Swift's 2024 Annual Report. In management's opinion, these condensed consolidated financial statements were prepared in accordance with GAAP and include all adjustments necessary (consisting of normal recurring adjustments) for the fair statement of the periods presented.

Note regarding comparability — The reported results do not include the LTL operations of DHE prior to its acquisition by the Company on July 30, 2024 in accordance with the accounting treatment applicable to the transaction. Accordingly, comparisons between the Company's current and prior period results may not be meaningful.

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.

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 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 is becoming more tempered. Additionally, macroeconomic trends and cyclical changes