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Note 6 - Other Income (Tables)
3 Months Ended
Mar. 31, 2022
Notes Tables  
Schedule of Other Nonoperating Income, by Component [Table Text Block]

Millions, for the Three Months Ended March 31,

 

2022

   

2021

 

Rental income

  $ 36     $ 33  
Environmental remediation and restoration     (26 )     (4 )

Net periodic pension costs

    20       5  

Other

    17       17  

Total

  $ 47     $ 51