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Properties (Tables)
12 Months Ended
Dec. 31, 2013
Notes To Financial Statements [Abstract]  
Property, Plant, Equipment
                    
In millions  December 31, 2013  December 31, 2012
  Depreciation   Accumulated       Accumulated   
  rate Cost depreciation  Net  Cost depreciation  Net
Track and roadway (1)2%$27,833 $7,103 $20,730 $26,209 $6,948 $19,261
Rolling stock 4% 5,193  1,894  3,299  4,989  1,785  3,204
Buildings 2% 1,392  521  871  1,275  492  783
Information technology (2)12% 1,000  455  545  976  427  549
Other6% 1,388  606  782  1,273  529  744
Total properties including capital leases$36,806 $10,579 $26,227 $34,722 $10,181 $24,541
                    

                    
(1)Includes the cost of land of $1,911 million and $1,766 million as at December 31, 2013 and December 31, 2012, respectively.
                    
(2)The Company capitalized $85 million in 2013 and $93 million in 2012 of internally developed software costs pursuant to FASB ASC 350-40, “Intangibles – Goodwill and Other, Internal – Use Software.”
Capital Lease Disclosure
                    
Capital leases included in properties                 
Track and roadway (3) $417 $58 $359 $417 $53 $364
Rolling stock   982  358  624  1,222  353  869
Buildings   109  21  88  109  18  91
Other  102  22  80  91  17  74
Total capital leases included in properties$1,610 $459 $1,151 $1,839 $441 $1,398
                    

                    
(3)Includes $108 million of right-of-way access in both years.