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Consolidated Statements of Income - USD ($)
shares in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Operating revenues:      
Total operating revenues $ 24,250 $ 24,119 $ 24,875
Operating expenses:      
Compensation and benefits 4,899 4,818 4,645
Purchased services and materials 2,520 2,616 2,442
Fuel 2,474 2,891 3,439
Depreciation 2,398 2,318 2,246
Equipment and other rents 920 947 898
Other 1,326 1,447 1,288
Total operating expenses 14,537 15,037 14,958
Operating income 9,713 9,082 9,917
Other income, net (Note 6) 350 491 426
Interest expense 1,269 1,340 1,271
Income before income taxes 8,794 8,233 9,072
Income tax expense (Note 7) (2,047) (1,854) (2,074)
Net income $ 6,747 $ 6,379 $ 6,998
Share and Per Share (Note 8):      
Earnings per share - basic (in dollars per share) $ 11.10 $ 10.47 $ 11.24
Earnings per share - diluted (in dollars per share) $ 11.09 $ 10.45 $ 11.21
Weighted average number of shares - basic (in shares) 607.6 609.2 622.7
Weighted average number of shares - diluted (in shares) 608.6 610.2 624.0
Freight revenues      
Operating revenues:      
Total operating revenues $ 22,811 $ 22,571 $ 23,159
Other revenues      
Operating revenues:      
Total operating revenues $ 1,439 $ 1,548 $ 1,716