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Consolidated Statements of Income - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Income Statement [Abstract]      
Railway operating revenues $ 12,745 $ 11,142 $ 9,789
Railway operating expenses      
Compensation and benefits 2,621 2,442 2,373
Purchased services and rents 1,922 1,726 1,687
Fuel 1,459 799 535
Depreciation 1,221 1,181 1,154
Materials and other 713 547 653
Loss on asset disposal 0 0 385
Total railway operating expenses 7,936 6,695 6,787
Income from railway operations 4,809 4,447 3,002
Other income – net 13 77 153
Interest expense on debt 692 646 625
Income before income taxes 4,130 3,878 2,530
Income taxes 860 873 517
Net income $ 3,270 $ 3,005 $ 2,013
Earnings per share      
Basic (in dollars per share) $ 13.92 $ 12.16 $ 7.88
Diluted (in dollars per share) $ 13.88 $ 12.11 $ 7.84