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Property, Plant and Equipment, Net
3 Months Ended
Mar. 31, 2013
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
 
March 31, 2013
 
December 31, 2012
 
(in years)
 
(in millions)
Land
 
 
$
461

 
$
465

Buildings and improvements
4 - 40
 
2,068

 
2,064

Machinery, equipment and furniture
1 - 30
 
4,682

 
4,519

Assets leased to others
15 - 39
 
836

 
743

Construction in progress
 
 
536

 
649

 
 
 
8,583

 
8,440

Less: Accumulated depreciation and amortization
 
 
(2,012
)
 
(1,917
)
Property, plant and equipment, net
 
 
$
6,571

 
$
6,523


Depreciation and amortization expense related to property, plant and equipment for the three months ended March 31, 2013 and 2012 was $134 million and $85 million, respectively.