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Property, Plant and Equipment, Net
12 Months Ended
Dec. 31, 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:
 
 
 
December 31,
  
Useful Life
 
2012
 
2011
 
(in years)
 
(in millions)
Land
 
 
$
465

 
$
464

Buildings and improvements
4 - 40
 
2,064

 
1,040

Machinery, equipment and furniture
1 - 30
 
4,519

 
2,565

Assets leased to others
15 - 39
 
743

 
509

Construction in progress
 
 
649

 
410

 
 
 
8,440

 
4,988

Less: Accumulated depreciation and amortization
 
 
(1,917
)
 
(1,483
)
Property, plant and equipment, net
 
 
$
6,523

 
$
3,505


Depreciation and amortization expense related to property, plant and equipment for the years ended ended December 31, 2012, 2011 and 2010 was $470 million, $345 million and $365 million, respectively.