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Properties (Tables)
 12 Months Ended
Dec. 28, 2012
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 2012
 
Cost
 
Depreciation
 
Value
 
Rate (a)
 
Method
 
Life
Road
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Rail and Other Track Material
 
$
6,177

 
$
(1,131
)
 
$
5,046

 
2.9%
 
Group Life
 
 
 
 
Ties
 
4,287

 
(861
)
 
3,426

 
4.0%
 
Group Life
 
 
 
 
Grading
 
2,407

 
(414
)
 
1,993

 
1.5%
 
Group Life
 
 
 
 
Ballast
 
2,528

 
(624
)
 
1,904

 
2.8%
 
Group Life
 
 
 
 
Bridges, Trestles, and Culverts
 
1,962

 
(224
)
 
1,738

 
1.6%
 
Group Life
 
 
 
 
Signals and Interlockers
 
1,787

 
(302
)
 
1,485

 
3.4%
 
Group Life
 
 
 
 
Buildings
 
926

 
(316
)
 
610

 
2.5%
 
Group Life
 
 
 
 
Other
 
3,345

 
(1,281
)
 
2,064

 
4.7%
 
Group Life
 
 
Total Road
 
$
23,419

 
$
(5,153
)
 
$
18,266

 
 
 
 
 
6-80 Years
Equipment
 
 

 
 
 
 
 
 
 
 
 
 
 
 
Locomotive
 
$
4,747

 
$
(2,079
)
 
$
2,668

 
3.6%
 
Group Life
 
 
 
 
Freight Cars
 
3,088

 
(1,119
)
 
1,969

 
3.1%
 
Group Life
 
 
 
 
Work Equipment and Other
 
1,466

 
(810
)
 
656

 
7.1%
 
Group Life
 
 
Total Equipment
 
$
9,301

 
$
(4,008
)
 
$
5,293

 
 
 
 
 
5-38 Years
Land
 
 
 
1,745

 
—

 
1,745

 
N/A
 
N/A
 
N/A
Construction In Progress
 
602

 
—

 
602

 
N/A
 
N/A
 
N/A
Other
 
 
 
212

 
(68
)
 
144

 
N/A
 
Straight Line
 
4-30 Years
Total Properties
 
$
35,279

 
$
(9,229
)
 
$
26,050

 
 
 
 
 
 


(a)
Composite depreciation rates, which are used in group-life depreciation, apply to railroad assets which account for more than 85% of total properties.  All other property is depreciated on a straight-line basis over the asset’s useful life. 

NOTE 6.  Properties, continued

(Dollars in Millions)
 
 
 
Accumulated
 
Net Book
 
Annual Depreciation
 
Depreciation
 
Estimated Useful
December 2011
 
Cost
 
Depreciation
 
Value
 
Rate (a)
 
Method
 
Life
Road
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Rail and Other Track Material
 
$
5,949

 
$
(1,021
)
 
$
4,928

 
2.7%
 
Group Life
 
 
 
 
Ties
 
4,126

 
(868
)
 
3,258

 
3.7%
 
Group Life
 
 
 
 
Grading
 
2,379

 
(382
)
 
1,997

 
1.3%
 
Group Life
 
 
 
 
Ballast
 
2,446

 
(610
)
 
1,836

 
2.5%
 
Group Life
 
 
 
 
Bridges, Trestles, and Culverts
 
1,887

 
(195
)
 
1,692

 
1.4%
 
Group Life
 
 
 
 
Signals and Interlockers
 
1,680

 
(198
)
 
1,482

 
3.3%
 
Group Life
 
 
 
 
Buildings
 
874

 
(342
)
 
532

 
2.5%
 
Group Life
 
 
 
 
Other
 
3,038

 
(1,273
)
 
1,765

 
3.0%
 
Group Life
 
 
Total Road
 
$
22,379

 
$
(4,889
)
 
$
17,490

 
 
 
 
 
6-80 Years
Equipment
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Locomotive
 
4,455

 
(1,960
)
 
2,495

 
3.5%
 
Group Life
 
 
 
 
Freight Cars
 
2,821

 
(1,095
)
 
1,726

 
3.5%
 
Group Life
 
 
 
 
Work Equipment and Other
 
1,345

 
(746
)
 
599

 
7.3%
 
Group Life
 
 
Total Equipment
 
$
8,621

 
$
(3,801
)
 
$
4,820

 
 
 
 
 
5-35 Years
Land
 
 
 
1,832

 
—

 
1,832

 
N/A
 
N/A
 
N/A
Construction In Progress
 
728

 
—

 
728

 
N/A
 
N/A
 
N/A
Other
 
 
 
144

 
(40
)
 
104

 
N/A
 
Straight Line
 
4-30 Years
Total Properties
 
$
33,704

 
$
(8,730
)
 
$
24,974

 
 
 
 
 
 

(a)
Composite depreciation rates, which are used in group-life depreciation, apply to railroad assets which account for more than 85% of total properties.  All other property is depreciated on a straight-line basis over the asset’s useful life. 
Schedule of deferred gain on sale of real estate
The deferred gain balance included in the consolidated balance sheets is in the table below.
 
 
Deferred gain as of
(Dollars in Millions)
 
December 2012
December 2011
Current portion, included in Other Current Liabilities
 
$
43

$
95

Long term portion, included in Other Long-Term Liabilities

 
9

37

Total
 
$
52

$
132