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Property and Equipment, Net (Tables)
12 Months Ended
Dec. 31, 2019
Property and Equipment [Abstract]  
Property and Equipment, net
Property and equipment, net (in millions), and the corresponding ranges of estimated useful lives were as follows:
 
 
December 31,
2019
 
December 31,
2018
 
Range of
Estimated
Useful Life
Land for transportation purposes
 
$
6,280

 
$
6,218

 

Track structure
 
25,599

 
24,214

 
15 – 50 years

Other roadway
 
30,525

 
29,077

 
10 – 100 years

Locomotives
 
8,533

 
8,660

 
8 – 36 years

Freight cars and other equipment
 
3,567

 
3,100

 
8 – 41 years

Computer hardware, software and other
 
1,382

 
1,256

 
6 – 15 years

Construction in progress
 
748

 
664

 

      Total cost
 
76,634

 
73,189

 
 
Less accumulated depreciation and amortization
 
(12,101
)
 
(10,004
)
 
 
      Property and equipment, net
 
$
64,533

 
$
63,185