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Segment Reporting
 6 Months Ended
Jun. 30, 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.

Second QuarterFirst Six Months
2025202420252024
($ in millions)
Railway operating revenues (Note 2)
$3,110 $3,044 $6,103 $6,048 
Railway operating expenses
Compensation and benefits692 700 1,431 1,436 
Purchased services409 419 810 839 
Equipment rents111 97 208 205 
Fuel219 257 463 541 
Depreciation346 335 692 672 
Materials98 92 198 190 
Claims59 50 125 98 
Other38 31 77 100 
Restructuring and other charges10 (3)10 96 
Eastern Ohio incident(47)(65)(232)527 
Total railway operating expenses1,935 1,913 3,782 4,704 
Income from railway operations1,175 1,131 2,321 1,344 
Other income – net24 17 55 35 
Interest expense on debt201 204 400 405 
Income before income taxes998 944 1,976 974 
Income taxes230 207 458 184 
Net income$768 $737 $1,518 $790