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Segment Reporting
 3 Months Ended
Mar. 31, 2025
Segment Reporting [Abstract]  
Segment Reporting Segment Reporting
The Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2023-07 “Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures” which requires additional reportable segment disclosures related to significant segment expenses and information used to assess performance. We adopted the provisions of this standard and updated our segment disclosures herein.

We manage our company as one reportable operating segment, railway operations, providing rail transportation to customers. Although we provide and analyze revenues by commodity group, the overall financial and operational performance of the railroad is analyzed as one operating segment due to the nature of our integrated rail network.

The chief operating decision maker assesses performance for the railway operations segment and decides how to allocate resources based on “Net income” that is reported on the Consolidated Statements of Income. The measure of segment assets is reported on the Consolidated Balance Sheets as “Total assets.” Total expenditures for long-lived assets are disclosed as “Property additions” on the Consolidated Statement of Cash Flows.
Railway operations segment revenues, expenses, and profit are disclosed below as reviewed and used by the chief operating decision maker. There are no other significant segment items or reconciling items to segment profit.

First Quarter
20252024
($ in millions)
Railway operating revenues (Note 2)
$2,993 $3,004 
Railway operating expenses
Compensation and benefits739 736 
Purchased services401 420 
Equipment rents97 108 
Fuel244 284 
Depreciation346 337 
Materials100 98 
Claims66 48 
Other39 69 
Restructuring and other charges— 99 
Eastern Ohio incident(185)592 
Total railway operating expenses1,847 2,791 
Income from railway operations1,146 213 
Other income – net31 18 
Interest expense on debt199 201 
Income before income taxes978 30 
Income taxes228 (23)
Net income$750 $53