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Note 11 - Properties (Tables)
9 Months Ended
Sep. 30, 2024
Notes Tables  
Property, Plant and Equipment [Table Text Block]

Millions, Except Estimated Useful Life

         

Accumulated

   

Net Book

   

Estimated

 

As of September 30, 2024

 

Cost

   

Depreciation

   

Value

   

Useful Life

 

Land

  $ 5,439       N/A     $ 5,439       N/A  

Road:

                               

Rail and other track material

    19,180       7,569       11,611       46  

Ties

    12,268       4,053       8,215       34  

Ballast

    6,457       2,148       4,309       34  

Other roadway [a]

    23,697       5,601       18,096       47  

Total road

    61,602       19,371       42,231       N/A  

Equipment:

                               

Locomotives

    9,561       3,750       5,811       18  

Freight cars

    2,964       1,024       1,940       23  

Work equipment and other [b]

    1,191       472       719       17  

Total equipment

    13,716       5,246       8,470       N/A  

Technology and other

    1,423       616       807       12  

Construction in progress

    1,089       -       1,089       N/A  

Total

  $ 83,269     $ 25,233     $ 58,036       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