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Properties (Tables)
 12 Months Ended
Dec. 30, 2011
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
As of December 30, 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. 

NOTE 6.  Properties, continued

(Dollars in Millions)
 
 
 
Accumulated
 
Net Book
 
Annual Depreciation
 
Depreciation
 
Estimated Useful
As of December 31, 2010
 
Cost
 
Depreciation
 
Value
 
Rate (a)
 
Method
 
Life
Road
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Rail and Other Track Material
 
$
5,568

 
$
(937
)
 
$
4,631

 
2.7%
 
Group Life
 
 
 
 
Ties
 
3,896

 
(807
)
 
3,089

 
3.7%
 
Group Life
 
 
 
 
Grading
 
2,368

 
(348
)
 
2,020

 
1.3%
 
Group Life
 
 
 
 
Ballast
 
2,372

 
(605
)
 
1,767

 
2.5%
 
Group Life
 
 
 
 
Bridges, Trestles, and Culverts
 
1,815

 
(170
)
 
1,645

 
1.4%
 
Group Life
 
 
 
 
Signals and Interlockers
 
1,610

 
(183
)
 
1,427

 
3.3%
 
Group Life
 
 
 
 
Buildings
 
750

 
(253
)
 
497

 
2.5%
 
Group Life
 
 
 
 
Other
 
2,527

 
(1,014
)
 
1,513

 
3.0%
 
Group Life
 
 
Total Road
 
$
20,906

 
$
(4,317
)
 
$
16,589

 
 
 
 
 
6 - 80 years
Equipment
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Locomotive
 
4,354

 
(1,852
)
 
2,502

 
3.5%
 
Group Life
 
 
 
 
Freight Cars
 
2,653

 
(1,096
)
 
1,557

 
3.5%
 
Group Life
 
 
 
 
Work Equipment and Other
 
436

 
(199
)
 
237

 
7.3%
 
Group Life
 
 
Total Equipment
 
$
7,443

 
$
(3,147
)
 
$
4,296

 
 
 
 
 
5 - 35 years
Land
 
 
 
1,875

 
N/A

 
1,875

 
N/A
 
N/A
 
N/A
Construction In Progress
 
529

 
N/A

 
529

 
N/A
 
N/A
 
N/A
Other
 
 
 
1,312

 
(802
)
 
510

 
N/A
 
Straight Line
 
4 - 30 years
Total Properties
 
$
32,065

 
$
(8,266
)
 
$
23,799

 
 
 
 
 
 

(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.
(Dollars in Millions)
 
Deferred gain as of December 2011
Current portion, included in Other Current Liabilities
 
$
95

Long term portion, included in Other Long-Term Liabilities

 
37

Total
 
$
132