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Segment Reporting and Significant Expenses
 3 Months Ended
Mar. 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.

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 11. 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 quarters ended March 31, 2025, and March 31, 2024.

Quarters Ended
March 31, 2025March 31, 2024
(Dollars in Millions)RailReconciliation to ConsolidatedRailReconciliation to Consolidated
Revenue$3,221 $3,466 
Reconciliation of Revenue
Trucking Revenue (a)
207217
Elimination of intersegment revenues(5)(2)
Total Consolidated Revenue$3,423 $3,681 
Expense
Labor and Fringe$774 $760 
Purchased Services and Other662602
Depreciation and Amortization410395
Fuel
Locomotive225276
Non-Locomotive3025
Equipment and Other Rents8278
Gain on Property Disposition—(1)
Segment Operating Income$1,038 $1,331 
Reconciliation of Operating Income
Trucking Expenses (b)
204211
Elimination of intersegment expenses(5)(2)
Total Consolidated Operating Income$1,041 $1,337 

(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.
NOTE 11. Segment Reporting and Significant Expenses, continued

Reconciliation of Segment Operating Income to Consolidated Earnings Before Income Taxes
Quarters Ended
(Dollars in Millions)
March 31, 2025March 31, 2024
Segment Operating Income$1,038 $1,331 
Trucking Revenue and Eliminations
202 215 
Trucking Expenses and Eliminations
(199)(209)
Total Consolidated Operating Income1,041 1,337 
Interest Expense
(209)(210)
Other Income - Net
26 41 
Earnings Before Income Taxes
$858 $1,168 

Other Segment Disclosures
Capital expenditures made by the rail segment were $691 million and $498 million, for the quarters ended March 31, 2025, and March 31 2024, respectively. The total of the rail segment's reportable assets was $43.0 billion and $42.6 billion as of March 31, 2025, and December 31, 2024, respectively, out of total consolidated assets of $43.2 billion and $42.8 billion for the respective periods. Non-rail assets include assets held by the trucking operating segment.