v3.26.3
Properties
 9 Months Ended
Sep. 30, 2026
Property, Plant, and Equipment [Abstract]  
Properties 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
As of September 30, 2026		CostAccumulated
depreciation		Net book
value		Estimated
useful life
Land$5,495  N/A $5,495  N/A
Road:
Rail and other track material20,040 8,150 11,890 43
Ties13,106 4,448 8,658 34
Ballast6,783 2,402 4,381 34
Other roadway [a]25,103 6,390 18,713 47
Total road65,032 21,390 43,642  N/A
Equipment:
Locomotives10,278 3,853 6,425 17
Freight cars3,116 1,173 1,943 22
Work equipment and other 1,397 585 812 17
Total equipment14,791 5,611 9,180  N/A
Technology and other1,451 733 718 12
Construction in progress1,591 N/A 1,591  N/A
Total$88,360 $27,734 $60,626  N/A

Millions, except estimated useful life
As of December 31, 2025		CostAccumulated
depreciation		Net book
value		Estimated
useful life
Land$5,471 N/A$5,471 N/A
Road:
Rail and other track material19,747 7,936 11,811 45
Ties12,779 4,305 8,474 34
Ballast6,646 2,309 4,337 34
Other roadway [a]24,610 6,080 18,530 47
Total road63,782 20,630 43,152 N/A
Equipment:
Locomotives9,926 3,813 6,113 18
Freight cars3,080 1,107 1,973 23
Work equipment and other1,318 540 778 17
Total equipment14,324 5,460 8,864 N/A
Technology and other1,414 669 745 12
Construction in progress1,413 N/A1,413 N/A
Total$86,404 $26,759 $59,645 N/A
[a]Other roadway includes grading, bridges and tunnels, signals, buildings, and other road assets.