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Properties (Tables)
 12 Months Ended
Dec. 26, 2014
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 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

 
 
 
 
 
 



NOTE 6.  Properties, continued

(Dollars in Millions)
 
 
 
Accumulated
 
Net Book
 
Annual Depreciation
 
Depreciation
 
Estimated Useful
December 2013
 
Cost
 
Depreciation
 
Value
 
Rate
 
Method
 
Life
Road
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Rail and Other Track Material
 
$
6,452

 
$
(1,270
)
 
$
5,182

 
2.9%
 
Group Life
 
 
 
 
Ties
 
4,534

 
(947
)
 
3,587

 
4.0%
 
Group Life
 
 
 
 
Grading
 
2,425

 
(448
)
 
1,977

 
1.5%
 
Group Life
 
 
 
 
Ballast
 
2,612

 
(645
)
 
1,967

 
2.8%
 
Group Life
 
 
 
 
Bridges, Trestles, and Culverts
 
2,008

 
(250
)
 
1,758

 
1.6%
 
Group Life
 
 
 
 
Signals and Interlockers
 
1,922

 
(291
)
 
1,631

 
3.4%
 
Group Life
 
 
 
 
Buildings
 
1,011

 
(355
)
 
656

 
2.5%
 
Group Life
 
 
 
 
Other
 
3,654

 
(1,386
)
 
2,268

 
4.7%
 
Group Life
 
 
Total Road
 
24,618

 
(5,592
)
 
19,026

 
 
 
 
 
6-80 Years
Equipment
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Locomotive
 
4,987

 
(2,176
)
 
2,811

 
3.6%
 
Group Life
 
 
 
 
Freight Cars
 
3,111

 
(1,135
)
 
1,976

 
3.1%
 
Group Life
 
 
 
 
Work Equipment and Other
 
1,666

 
(914
)
 
752

 
7.1%
 
Group Life
 
 
Total Equipment
 
9,764

 
(4,225
)
 
5,539

 
 
 
 
 
5-38 Years
Land
 
 
 
1,842

 
—

 
1,842

 
N/A
 
N/A
 
N/A
Construction In Progress
 
854

 
—

 
854

 
N/A
 
N/A
 
N/A
Other
 
 
 
106

 
(76
)
 
30

 
N/A
 
Straight Line
 
4-30 Years
Total Properties
 
$
37,184

 
$
(9,893
)
 
$
27,291