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Segment Reporting and Significant Expenses
 6 Months Ended
Jun. 30, 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 CEO. 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 June 30, 2025, and June 30, 2024.

Second Quarters
20252024
(Dollars in Millions)RailReconciliation to ConsolidatedRailReconciliation to Consolidated
Revenue (a)
$3,363 $3,480 
Reconciliation of Revenue
Trucking Revenue (a)
219223
Elimination of intersegment revenues(8)(2)
Total Consolidated Revenue$3,574 $3,701 
Expense (b)
Labor and Fringe$736 $719 
Purchased Services and Other605577
Depreciation and Amortization410396
Fuel
Locomotive226249
Non-Locomotive2327
Equipment and Other Rents9080
Gain on Property Disposition(4)(9)
Segment Operating Income$1,277 $1,441 
Reconciliation of Operating Income
Trucking Expenses (b)
213216
Elimination of intersegment expenses(8)(2)
Total Consolidated Operating Income$1,283 $1,448 
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 six months ended June 30, 2025, and June 30, 2024.

Six Months
20252024
(Dollars in Millions)RailReconciliation to ConsolidatedRailReconciliation to Consolidated
Revenue (a)
$6,584 $6,946 
Reconciliation of Revenue
Trucking Revenue (a)
426440
Elimination of intersegment revenues(13)(4)
Total Consolidated Revenue$6,997 $7,382 
Expense (b)
Labor and Fringe$1,510 $1,478 
Purchased Services and Other1,2691,178
Depreciation and Amortization820791
Fuel
Locomotive451525
Non-Locomotive5253
Equipment and Other Rents172159
Gain on Property Disposition(5)(10)
Segment Operating Income$2,315 $2,772 
Reconciliation of Operating Income
Trucking Expenses (b)
417427
Elimination of intersegment expenses(13)(4)
Total Consolidated Operating Income$2,324 $2,785 

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

Reconciliation of Segment Operating Income to Consolidated Earnings Before Income Taxes
Second QuartersSix Months
(Dollars in Millions)
2025202420252024
Segment Operating Income$1,277 $1,441 $2,315 $2,772 
Trucking Revenue and Eliminations
211 221 413436
Trucking Expenses and Eliminations
(205)(214)(404)(423)
Total Consolidated Operating Income1,283 1,448 2,324 2,785 
Interest Expense
(212)(209)(421)(419)
Other Income - Net
22 28 48 69 
Earnings Before Income Taxes
$1,093 $1,267 $1,951 $2,435 

Other Segment Disclosures
Capital expenditures made by the rail segment were $766 million and $524 million, for the second quarters 2025 and 2024, respectively, and $1,457 million and $1,021 million, for the six months ended June 30, 2025, and June 30, 2024, respectively. The total of the rail segment's reportable assets was $42.7 billion and $42.6 billion as of June 30, 2025, and December 31, 2024, respectively, out of total consolidated assets of $42.9 billion and $42.8 billion for the respective periods. Non-rail assets include assets held by the trucking operating segment.