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Note 5 - Other Income (Tables)
9 Months Ended
Sep. 30, 2023
Notes Tables  
Schedule of Other Nonoperating Income, by Component [Table Text Block]
  

Three Months Ended

  

Nine Months Ended

 
  

September 30,

  

September 30,

 

Millions

 

2023

  

2022

  

2023

  

2022

 

Real estate income [a]

 $90  $103  $335  $309 

Net periodic pension benefit/(costs)

  12   22   40   63 

Environmental remediation and restoration

  (9)  (4)  (31)  (35)

Other

  13   3   39   (3)

Total

 $106  $124  $383  $334