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Property, Plant and Equipment
12 Months Ended
Dec. 30, 2012
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment
Property, Plant and Equipment
At the end of 2012 and 2011, property, plant and equipment at cost and accumulated depreciation were:
(Dollars in Millions)
 
2012
 
2011
Land and land improvements
 
$
793

 
754

Buildings and building equipment
 
10,046

 
9,389

Machinery and equipment
 
21,075

 
19,182

Construction in progress
 
2,740

 
2,504

Total property, plant and equipment, gross
 
$
34,654

 
31,829

Less accumulated depreciation
 
18,557

 
17,090

Total property, plant and equipment, net
 
$
16,097

 
14,739


The Company capitalizes interest expense as part of the cost of construction of facilities and equipment. Interest expense capitalized in 2012, 2011 and 2010 was $115 million, $84 million and $73 million, respectively.
Depreciation expense, including the amortization of capitalized interest in 2012, 2011 and 2010, was $2.5 billion, $2.3 billion and $2.2 billion, respectively.
Upon retirement or other disposal of property, plant and equipment, the costs and related amounts of accumulated depreciation or amortization are eliminated from the asset and accumulated depreciation accounts, respectively. The difference, if any, between the net asset value and the proceeds are recorded in earnings.