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Properties (Tables)
 12 Months Ended
Dec. 25, 2015
Property, Plant and Equipment [Abstract]  
Schedule of net properties
A detail of the Company’s net properties are as follows:
(Dollars in Millions)
 
 
 
Accumulated
 
Net Book
 
Annual Depreciation
 
Depreciation
 
Estimated Useful
December 2015
 
Cost
 
Depreciation
 
Value
 
Rate
 
Method
 
Life
Road
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Rail and Other Track Material
 
$
7,150

 
$
(1,414
)
 
$
5,736

 
2.5%
 
Group Life
 
 
 
 
Ties
 
5,077

 
(1,147
)
 
3,930

 
3.7%
 
Group Life
 
 
 
 
Grading
 
2,533

 
(479
)
 
2,054

 
1.4%
 
Group Life
 
 
 
 
Ballast
 
2,793

 
(802
)
 
1,991

 
2.7%
 
Group Life
 
 
 
 
Bridges, Trestles, and Culverts
 
2,238

 
(283
)
 
1,955

 
1.6%
 
Group Life
 
 
 
 
Signals and Interlockers
 
2,315

 
(416
)
 
1,899

 
4.0%
 
Group Life
 
 
 
 
Buildings
 
1,152

 
(424
)
 
728

 
2.5%
 
Group Life
 
 
 
 
Other
 
4,306

 
(1,793
)
 
2,513

 
4.2%
 
Group Life
 
 
Total Road
 
27,564

 
(6,758
)
 
20,806

 
 
 
 
 
8-90 Years
Equipment
 
 

 
 
 
 
 
 
 
 
 
 
 
 
Locomotive
 
5,673

 
(2,461
)
 
3,212

 
3.6%
 
Group Life
 
 
 
 
Freight Cars
 
3,362

 
(1,018
)
 
2,344

 
3.2%
 
Group Life
 
 
 
 
Work Equipment and Other
 
2,073

 
(1,154
)
 
919

 
7.1%
 
Group Life
 
 
Total Equipment
 
11,108

 
(4,633
)
 
6,475

 
 
 
 
 
3-38 Years
Land
 
 
 
1,858

 
—

 
1,858

 
N/A
 
N/A
 
N/A
Construction In Progress
 
1,003

 
—

 
1,003

 
N/A
 
N/A
 
N/A
Other
 
 
 
41

 
(9
)
 
32

 
N/A
 
Straight Line
 
4-30 Years
Total Properties
 
$
41,574

 
$
(11,400
)
 
$
30,174

 
 
 
 
 
 



NOTE 6.  Properties, continued

(Dollars in Millions)
 
 
 
Accumulated
 
Net Book
 
Annual Depreciation
 
Depreciation
 
Estimated Useful
December 2014
 
Cost
 
Depreciation
 
Value
 
Rate
 
Method
 
Life
Road
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Rail and Other Track Material
 
$
6,771

 
$
(1,400
)
 
$
5,371

 
2.5%
 
Group Life
 
 
 
 
Ties
 
4,807

 
(1,060
)
 
3,747

 
3.7%
 
Group Life
 
 
 
 
Grading
 
2,460

 
(481
)
 
1,979

 
1.4%
 
Group Life
 
 
 
 
Ballast
 
2,693

 
(679
)
 
2,014

 
2.7%
 
Group Life
 
 
 
 
Bridges, Trestles, and Culverts
 
2,119

 
(278
)
 
1,841

 
1.6%
 
Group Life
 
 
 
 
Signals and Interlockers
 
2,103

 
(356
)
 
1,747

 
4.0%
 
Group Life
 
 
 
 
Buildings
 
1,102

 
(377
)
 
725

 
2.5%
 
Group Life
 
 
 
 
Other
 
4,070

 
(1,517
)
 
2,553

 
4.2%
 
Group Life
 
 
Total Road
 
26,125

 
(6,148
)
 
19,977

 
 
 
 
 
8-90 Years
Equipment
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Locomotive
 
5,036

 
(2,325
)
 
2,711

 
3.6%
 
Group Life
 
 
 
 
Freight Cars
 
3,244

 
(1,169
)
 
2,075

 
3.2%
 
Group Life
 
 
 
 
Work Equipment and Other
 
1,828

 
(1,032
)
 
796

 
7.1%
 
Group Life
 
 
Total Equipment
 
10,108

 
(4,526
)
 
5,582

 
 
 
 
 
3-38 Years
Land
 
 
 
1,875

 
—

 
1,875

 
N/A
 
N/A
 
N/A
Construction In Progress
 
1,196

 
—

 
1,196

 
N/A
 
N/A
 
N/A
Other
 
 
 
39

 
(85
)
 
(46
)
 
N/A
 
Straight Line
 
4-30 Years
Total Properties
 
$
39,343

 
$
(10,759
)
 
$
28,584