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Note 3 - Operations and Segmentation (Tables) | 6 Months Ended
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Jun. 30, 2024
Notes Tables |
Disaggregation of Revenue [Table Text Block] |
|  | Three Months Ended |  |  | Six Months Ended |
|  | June 30, |  |  | June 30, |
Millions |  | 2024 |  |  | 2023 |  |  | 2024 |  |  | 2023 |
Bulk |  | $ | 1,721 |  |  | $ | 1,757 |  |  | $ | 3,538 |  |  | $ | 3,654 |
Industrial |  |  | 2,123 |  |  |  | 2,086 |  |  |  | 4,227 |  |  |  | 4,103 |
Premium |  |  | 1,794 |  |  |  | 1,726 |  |  |  | 3,489 |  |  |  | 3,468 |
Total freight revenues |  | $ | 5,638 |  |  | $ | 5,569 |  |  | $ | 11,254 |  |  | $ | 11,225 |
Other subsidiary revenues |  |  | 212 |  |  |  | 220 |  |  |  | 429 |  |  |  | 455 |
Accessorial revenues |  |  | 131 |  |  |  | 149 |  |  |  | 305 |  |  |  | 300 |
Other |  |  | 26 |  |  |  | 25 |  |  |  | 50 |  |  |  | 39 |
Total operating revenues |  | $ | 6,007 |  |  | $ | 5,963 |  |  | $ | 12,038 |  |  | $ | 12,019 |

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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-5 + Details
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