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Property, Net Of Accumulated Depreciation
9 Months Ended
Sep. 30, 2011
Property, Net Of Accumulated Depreciation 
Property, Net Of Accumulated Depreciation
10.      Property, Net of Accumulated Depreciation

Property, net follows (in millions):
 
September 30,
2011
 
December 31,
2010
Land
$
109 
 
$
105 
Buildings
 
3,879 
   
3,692 
Equipment
 
11,705 
   
10,744 
Construction in progress
 
1,662 
   
822 
   
17,355 
   
15,363 
Accumulated depreciation
 
(7,089)
   
(6,420)
Total
$
10,266 
 
$
8,943 

In the three months ended September 30, 2011 and 2010, interest costs capitalized as part of property, net, were $11 million and $5 million, respectively.  In the nine months ended September 30, 2011 and 2010, interest costs capitalized as part of property, net, were $28 million and $12 million, respectively.

Manufacturing equipment includes certain components of production equipment that are constructed of precious metals.  At September 30, 2011 and December 31, 2010, the recorded value of precious metals totaled $2.3 billion and $2.0 billion, respectively.  Depletion expense for precious metals in the three months ended September 30, 2011 and 2010 totaled $6 million and $6 million, respectively.  Depletion expense for precious metals in the nine months ended September 30, 2011 and 2010 totaled $16 million and $12 million, respectively.