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Note 3 - Operations and Segmentation (Tables)
3 Months Ended
Mar. 31, 2022
Notes Tables  
Disaggregation of Revenue [Table Text Block]

Millions, for the Three Months Ended March 31,

 

2022

  

2021

 

Bulk

 $1,832  $1,512 

Industrial

  1,921   1,656 

Premium

  1,687   1,481 

Total freight revenues

 $5,440  $4,649 

Other subsidiary revenues

  205   177 

Accessorial revenues

  201   161 

Other

  14   14 

Total operating revenues

 $5,860  $5,001