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Condensed Consolidated Statements of Income (Unaudited) - USD ($)
shares in Millions, $ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Operating revenues:    
Total operating revenues $ 6,027 $ 6,031
Operating expenses:    
Compensation and benefits 1,212 1,223
Purchased services and materials 631 613
Depreciation 610 594
Fuel 603 658
Equipment and other rents 241 216
Other 359 355
Total operating expenses 3,656 3,659
Operating income 2,371 2,372
Other income, net (Note 6) 78 92
Interest expense (322) (324)
Income before income taxes 2,127 2,140
Income tax expense (501) (499)
Net income $ 1,626 $ 1,641
Share and per share (Note 7):    
Earnings per share - basic (in dollars per share) $ 2.71 $ 2.69
Earnings per share - diluted (in dollars per share) $ 2.70 $ 2.69
Weighted average number of shares - basic (in shares) 601.0 609.2
Weighted average number of shares - diluted (in shares) 601.9 610.2
Freight revenues    
Operating revenues:    
Total operating revenues $ 5,691 $ 5,616
Other revenues    
Operating revenues:    
Total operating revenues $ 336 $ 415