v3.25.2
Operations and Segmentation - Schedule of Freight and Other Revenues (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Disaggregation of Revenue [Line Items]        
Total operating revenues $ 6,154 $ 6,007 $ 12,181 $ 12,038
Locomotive fuel 576 625 1,179 1,283
Depreciation 613 596 1,223 1,190
Other income, net (123) (103) (201) (195)
Interest expense 335 319 657 643
Income tax expense 437 511 938 1,010
Net income 1,876 1,673 3,502 3,314
Total freight revenues        
Disaggregation of Revenue [Line Items]        
Total operating revenues 5,843 5,638 11,534 11,254
Reportable Segment        
Disaggregation of Revenue [Line Items]        
Total operating revenues 6,154 6,007 12,181 12,038
Operating 1,685 1,678 3,369 3,339
Administrative 188 189 381 380
Locomotive fuel 563 610 1,154 1,255
Other segment items 580 534 1,158 1,102
Depreciation 613 596 1,223 1,190
Other income, net (123) (103) (201) (195)
Interest expense 335 319 657 643
Income tax expense 437 511 938 1,010
Net income 1,876 1,673 3,502 3,314
Reportable Segment | Total freight revenues        
Disaggregation of Revenue [Line Items]        
Total operating revenues 5,843 5,638 11,534 11,254
Reportable Segment | Bulk        
Disaggregation of Revenue [Line Items]        
Total operating revenues 1,901 1,721 3,737 3,538
Reportable Segment | Industrial        
Disaggregation of Revenue [Line Items]        
Total operating revenues 2,212 2,123 4,294 4,227
Reportable Segment | Premium        
Disaggregation of Revenue [Line Items]        
Total operating revenues 1,730 1,794 3,503 3,489
Reportable Segment | Other subsidiary revenues        
Disaggregation of Revenue [Line Items]        
Total operating revenues 181 212 375 429
Reportable Segment | Accessorial revenues        
Disaggregation of Revenue [Line Items]        
Total operating revenues 107 131 225 305
Reportable Segment | Other        
Disaggregation of Revenue [Line Items]        
Total operating revenues $ 23 $ 26 $ 47 $ 50