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Revenues - Revenues Disaggregated by Lines of Business (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 3,895 | $ 3,292 | $ 11,123 | $ 9,095
Total Merchandise |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 2,143 | 1,881 | 6,165 | 5,602
Chemicals |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 678 | 624 | 1,962 | 1,810
Agricultural and Food Products |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 428 | 343 | 1,227 | 1,062
Automotive |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 274 | 209 | 769 | 661
Forest Products |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 264 | 231 | 743 | 684
Metals and Equipment |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 211 | 206 | 624 | 596
Minerals |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 180 | 162 | 494 | 439
Fertilizers |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 108 | 106 | 346 | 350
Intermodal |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 604 | 509 | 1,733 | 1,488
Coal |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 624 | 460 | 1,808 | 1,267
Trucking |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 251 | 200 | 740 | 200
Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 273 | $ 242 | $ 677 | $ 538

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