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Revenues - Revenues Disaggregated by Lines of Business (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 3,699 | $ 3,815 | $ 7,405 | $ 7,228
Total Merchandise |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 2,196 | 2,101 | 4,359 | 4,022
Chemicals |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 642 | 666 | 1,292 | 1,284
Agricultural and Food Products |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 415 | 412 | 852 | 799
Automotive |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 323 | 268 | 597 | 495
Forest Products |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 257 | 251 | 518 | 479
Metals and Equipment |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 240 | 216 | 479 | 413
Minerals |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 191 | 170 | 364 | 314
Fertilizers |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 128 | 118 | 257 | 238
Coal |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 637 | 651 | 1,270 | 1,184
Intermodal |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 492 | 602 | 991 | 1,129
Trucking |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 227 | 259 | 460 | 489
Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 147 | $ 202 | $ 325 | $ 404

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