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Operations and Segmentation (Tables)
 3 Months Ended
Mar. 31, 2021
Operations and Segmentation [Abstract]  
Freight Revenue By Commodity Group

The following table represents a disaggregation of our freight and other revenues:

Millions,

for the Three Months Ended March 31,

2021

2020 

Bulk

$

1,512 

$

1,534 

Industrial

1,656 

1,894 

Premium

1,481 

1,452 

Total freight revenues

$

4,649 

$

4,880 

Other subsidiary revenues

177 

214 

Accessorial revenues

161 

117 

Other

14 

18 

Total operating revenues

$

5,001 

$

5,229