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Segment Reporting and Significant Expenses
 12 Months Ended
Dec. 31, 2024
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 18. Segment Reporting and Significant Expenses, continued

The tables below present information about the Company's significant expenses and the required reportable segment reconciliations for the years ended 2024, 2023, and 2022.

Years Ended
December 31, 2024December 31, 2023December 31, 2022
(Dollars in Millions)RailReconciliation to ConsolidatedRailReconciliation to ConsolidatedRailReconciliation to Consolidated
Revenue$13,696 $13,775 $13,887 
Reconciliation of Revenue
Trucking Revenue (a)
851887968
Elimination of intersegment revenues(7)(5)(2)
Total Consolidated Revenue$14,540 $14,657 $14,853 
Expense
Labor and Fringe$2,971 $2,875 $2,723 
Purchased Services and Other2,3802,3112,189
Depreciation and Amortization1,5981,5501,453
Fuel
Locomotive9781,1691,381
Non-Locomotive102103105
Equipment and Other Rents335334372
Gain on Property Disposition(14)(34)(238)
Segment Operating Income$5,346 $5,467 $5,902 
Reconciliation of Operating Income
Trucking Expenses (b)
952855916
Elimination of intersegment expenses(7)(5)(2)
Total Consolidated Operating Income$5,245 $5,499 $5,954 

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

(b) Rail expenses represent expenses attributable to all CSX entities other than the trucking company, Quality Carriers. 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. 2024 expenses include a $108 million impairment charge of Quality Carriers' goodwill. See additional information in Note 19, Goodwill and Other Intangible Assets.
NOTE 18. Segment Reporting and Significant Expenses, continued

Reconciliation of Segment Operating Income to Consolidated Earnings Before Income Taxes
(Dollars in Millions)
December 31, 2024December 31, 2023December 31, 2022
Segment Operating Income$5,346 $5,467 $5,902 
Trucking Revenue and Eliminations
844882966
Trucking Expenses and Eliminations
(945)(850)(914)
Total Consolidated Operating Income5,245 5,499 5,954 
Interest Expense
(832)(809)(742)
Other Income - Net
142 139 133 
Earnings Before Income Taxes
$4,555 $4,829 $5,345 
Capital expenditures made by the rail segment were $2.45 billion, $2.17 billion, and $2.02 billion for 2024, 2023, and 2022, respectively. The total of the rail segment's reportable assets were $42.6 billion, $42.0 billion, and $41.5 billion as of December 31, 2024, 2023, and 2022, respectively, out of total consolidated assets of $42.8 billion, $42.2 billion, and $41.7 billion for the respective years. Non-rail assets include assets held by the trucking operating segment.