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Property, Plant and Equipment, Net
9 Months Ended
Sep. 30, 2012
Property, Plant and Equipment, Net [Abstract]  
Property, Plant and Equipment, Net
Property, Plant and Equipment, Net.
Property, plant and equipment, net consists of the following:
  
Useful Life
 
September 30, 2012
 
December 31,
 2011
 
(in years)
 
(in millions)
Land
 
 
$
467

 
$
464

Buildings and improvements
4 - 40
 
2,022

 
1,040

Machinery, equipment and furniture
1 - 30
 
4,289

 
2,565

Assets leased to others
15 - 39
 
664

 
509

Construction in progress
 
 
665

 
410

 
 
 
8,107

 
4,988

Less: Accumulated depreciation and amortization
 
 
(1,782
)
 
(1,483
)
Property, plant and equipment, net
 
 
$
6,325

 
$
3,505


Depreciation and amortization expense related to property, plant and equipment for the three months ended September 30, 2012 and 2011 was $134 million and $86 million, respectively, and for the nine months ended September 30, 2012 and 2011 was $334 million and $258 million, respectively.