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Segment Reporting and Significant Expenses
 12 Months Ended
Dec. 31, 2025
Segment Reporting [Abstract]  
Segment Reporting and Significant Expenses Segment Reporting and Significant Expenses
The Company has two operating segments: rail and trucking. Although the Company provides a breakdown of revenue by line of business, the overall financial and operational performance of the railroad is analyzed as one operating segment due to the integrated nature of the rail network. The "Rail" column in the table below includes the activities of all CSX entities other than the trucking company, Quality Carriers, and also includes the Company's equity in the net income of equity method investments. As the trucking segment is not material for separate disclosure as a reportable segment, the results of these operations are included as a reconciliation to the Company's consolidated results in the tables below. See additional information in Note 1, Nature of Operations and Significant Accounting Policies.

The Company's chief operating decision maker ("CODM") is its Chief Executive Officer. The CODM reviews information presented on a consolidated basis, accompanied by supplemental information about the trucking segment separately, for purposes of allocating resources and evaluating financial performance. The Company has determined that operating income is the key measure of segment profit or loss as this measure is the focus of the CODM in developing financial plans, including resource allocation, and evaluating actual financial performance against plan. The CODM regularly reviews operating results broken out by significant expense.
NOTE 17. Segment Reporting and Significant Expenses, continued

The table below presents information about the Company's significant expenses and the required reportable segment reconciliations for the years ended 2025, 2024 and 2023.

Years Ended
December 31, 2025December 31, 2024December 31, 2023
(Dollars in Millions)RailReconciliation to ConsolidatedRailReconciliation to ConsolidatedRailReconciliation to Consolidated
Revenue$13,276 $13,696 $13,775 
Reconciliation of Revenue
Trucking Revenue (a)
839851887
Elimination of intersegment revenues(23)(7)(5)
Total Consolidated Revenue$14,092 $14,540 $14,657 
Expense
Labor and Fringe$3,049 $2,971 $2,875 
Purchased Services and Other2,5862,3802,311
Depreciation and Amortization1,6161,5981,550
Fuel
Locomotive9149781,169
Non-Locomotive99102103
Equipment and Other Rents336335334
Gain on Property Disposition(13)(14)(34)
Segment Operating Income$4,689 $5,346 $5,467 
Reconciliation of Operating Income
Trucking Expenses (b)
1,007952855
Elimination of intersegment expenses(23)(7)(5)
Total Consolidated Operating Income$4,521 $5,245 $5,499 
Interest Expense(844)(832)(809)
Other Income-Net92142139
Earnings Before Income Taxes$3,769 $4,555 $4,829 

(a) Trucking revenue is comprised of revenue from Quality Carriers. Rail revenue represents revenue attributed to all CSX entities other than the trucking company, Quality Carriers.

(b) Trucking expenses include labor and fringe, purchased services and other, depreciation and amortization, fuel, equipment and other rents, and gains/losses on property dispositions from the operations of Quality Carriers. Rail expenses represent expenses attributable to all CSX entities other than the trucking company, Quality Carriers. Trucking expenses include $164 million and $108 million impairment charges related to Quality Carriers' goodwill in 2025 and 2024, respectively. See additional information in Note 18, Goodwill and Other Intangible Assets.
NOTE 17. Segment Reporting and Significant Expenses, continued
Capital expenditures made by the rail segment were $2.9 billion, $2.5 billion, and $2.2 billion for 2025, 2024 and 2023, respectively. Capital expenditures include $470 million in 2025 and $50 million in 2024 related to rebuilding the Blue Ridge subdivision as a result of impacts from Hurricane Helene. The total of the rail segment's reportable assets were $43.5 billion, $42.6 billion, and $42.0 billion as of December 31, 2025, 2024 and 2023, respectively, out of total consolidated assets of $43.7 billion, $42.8 billion, and $42.2 billion for the respective years. The remaining non-rail assets are comprised of assets held by the trucking operating segment.