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Note 11 - Properties | 6 Months Ended
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Jun. 30, 2024
Notes to Financial Statements |
Property, Plant and Equipment Disclosure [Text Block] | 11. Properties The following tables list the major categories of property and equipment, as well as the weighted-average estimated useful life for each category (in years):
Millions, Except Estimated Useful Life |  |  |  |  |  | Accumulated |  |  | Net Book |  |  | Estimated |
As of June 30, 2024 |  | Cost |  |  | Depreciation |  |  | Value |  |  | Useful Life |
Land |  | $ | 5,438 |  |  | $ | N/A |  |  | $ | 5,438 |  |  |  | N/A |
Road: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Rail and other track material |  |  | 19,065 |  |  |  | 7,494 |  |  |  | 11,571 |  |  |  | 46 |
Ties |  |  | 12,165 |  |  |  | 4,010 |  |  |  | 8,155 |  |  |  | 34 |
Ballast |  |  | 6,415 |  |  |  | 2,122 |  |  |  | 4,293 |  |  |  | 34 |
Other roadway [a] |  |  | 23,512 |  |  |  | 5,527 |  |  |  | 17,985 |  |  |  | 47 |
Total road |  |  | 61,157 |  |  |  | 19,153 |  |  |  | 42,004 |  |  |  | N/A |
Equipment: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Locomotives |  |  | 9,532 |  |  |  | 3,665 |  |  |  | 5,867 |  |  |  | 18 |
Freight cars |  |  | 2,933 |  |  |  | 1,011 |  |  |  | 1,922 |  |  |  | 23 |
Work equipment and other [b] |  |  | 1,168 |  |  |  | 455 |  |  |  | 713 |  |  |  | 17 |
Total equipment |  |  | 13,633 |  |  |  | 5,131 |  |  |  | 8,502 |  |  |  | N/A |
Technology and other |  |  | 1,421 |  |  |  | 609 |  |  |  | 812 |  |  |  | 12 |
Construction in progress |  |  | 1,079 |  |  |  | - |  |  |  | 1,079 |  |  |  | N/A |
Total |  | $ | 82,728 |  |  | $ | 24,893 |  |  | $ | 57,835 |  |  |  | N/A |
Millions, Except Estimated Useful Life |  |  |  |  |  | Accumulated |  |  | Net Book |  |  | Estimated |
As of December 31, 2023 |  | Cost |  |  | Depreciation |  |  | Value |  |  | Useful Life |
Land |  | $ | 5,426 |  |  | $ | N/A |  |  | $ | 5,426 |  |  |  | N/A |
Road: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Rail and other track material |  |  | 18,837 |  |  |  | 7,344 |  |  |  | 11,493 |  |  |  | 42 |
Ties |  |  | 11,985 |  |  |  | 3,895 |  |  |  | 8,090 |  |  |  | 34 |
Ballast |  |  | 6,345 |  |  |  | 2,061 |  |  |  | 4,284 |  |  |  | 34 |
Other roadway [a] |  |  | 23,175 |  |  |  | 5,368 |  |  |  | 17,807 |  |  |  | 47 |
Total road |  |  | 60,342 |  |  |  | 18,668 |  |  |  | 41,674 |  |  |  | N/A |
Equipment: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Locomotives |  |  | 9,295 |  |  |  | 3,591 |  |  |  | 5,704 |  |  |  | 18 |
Freight cars |  |  | 2,765 |  |  |  | 956 |  |  |  | 1,809 |  |  |  | 23 |
Work equipment and other |  |  | 1,344 |  |  |  | 546 |  |  |  | 798 |  |  |  | 17 |
Total equipment |  |  | 13,404 |  |  |  | 5,093 |  |  |  | 8,311 |  |  |  | N/A |
Technology and other |  |  | 1,388 |  |  |  | 574 |  |  |  | 814 |  |  |  | 12 |
Construction in progress |  |  | 1,173 |  |  |  | - |  |  |  | 1,173 |  |  |  | N/A |
Total |  | $ | 81,733 |  |  | $ | 24,335 |  |  | $ | 57,398 |  |  |  | N/A |
[a] | Other roadway includes grading, bridges and tunnels, signals, buildings, and other road assets.
[b] | For retirements of depreciable railroad properties that do not occur in the normal course of business, a gain or loss may be recognized if the retirement meets each of the following three conditions: (a) is unusual, (b) is material in amount, and (c) varies significantly from the retirement profile identified through our depreciation studies. In the second quarter of 2024, we sold a large portion of an intermodal equipment asset class resulting in a $46 million gain recognized in other expense in our Condensed Consolidated Statements of Income.

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