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Note 11 - Properties (Tables)
9 Months Ended
Sep. 30, 2022
Notes Tables  
Property, Plant and Equipment [Table Text Block]

Millions, Except Estimated Useful Life

    

Accumulated

 

Net Book

 

Estimated

 

As of September 30, 2022

 

Cost

 

Depreciation

 

Value

 

Useful Life

 

Land

 $5,334  $N/A  $5,334   N/A 

Road:

                

Rail and other track material

  18,329   7,024   11,305   43 

Ties

  11,610   3,648   7,962   34 

Ballast

  6,182   1,925   4,257   34 

Other roadway [a]

  22,151   4,890   17,261   47 

Total road

  58,272   17,487   40,785   N/A 

Equipment:

                

Locomotives

  9,214   3,693   5,521   18 

Freight cars

  2,511   879   1,632   23 

Work equipment and other

  1,216   457   759   17 

Total equipment

  12,941   5,029   7,912   N/A 

Technology and other

  1,255   536   719   13 

Construction in progress

  939   -   939   N/A 

Total

 $78,741  $23,052  $55,689   N/A 

Millions, Except Estimated Useful Life

   

Accumulated

 

Net Book

 

Estimated

 

As of December 31, 2021

 

Cost

 

Depreciation

 

Value

 

Useful Life

 

Land

 $5,339  $N/A  $5,339   N/A 

Road:

                

Rail and other track material

  17,980   6,844   11,136   44 

Ties

  11,364   3,516   7,848   34 

Ballast

  6,070   1,852   4,218   34 

Other roadway [a]

  21,593   4,657   16,936   47 

Total road

  57,007   16,869   40,138   N/A 

Equipment:

                

Locomotives

  9,371   3,779   5,592   17 

Freight cars

  2,227   822   1,405   24 

Work equipment and other

  1,161   411   750   18 

Total equipment

  12,759   5,012   7,747   N/A 

Technology and other

  1,209   523   686   12 

Construction in progress

  961   -   961   N/A 

Total

 $77,275  $22,404  $54,871   N/A