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Operations And Segmentation (Tables)
6 Months Ended
Jun. 30, 2013
Operations and Segmentation [Abstract]  
Freight Revenue By Commodity Group [Table Text Block]

The following table provides freight revenue by commodity group:

  Three Months Ended  Six Months Ended
  June 30,   June 30,
Millions  2013 2012  2013 2012
Agricultural $ 784$ 854 $ 1,568$ 1,712
Automotive   534  475   1,021  905
Chemicals   890  795   1,763  1,563
Coal  975  869   1,911  1,864
Industrial Products   977  917   1,893  1,780
Intermodal   993  1,003   1,981  1,912
Total freight revenues   5,153  4,913   10,137  9,736
Other revenues   317  308   623  597
Total operating revenues $ 5,470$ 5,221 $ 10,760$ 10,333