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Plant and Equipment and Goodwill (Tables)
 9 Months Ended
Sep. 30, 2014
Plant and Equipment and Goodwill [Abstract]  
Plant and equipment
Plant and equipment consisted of the following (in millions):

  
September 30,
2014
  
December 31,
2013
 
     
Plant and equipment, at cost
 
$
3,543
  
$
3,670
 
Accumulated depreciation
  
(1,602
)
  
(1,633
)
Total plant and equipment
 
$
1,941
  
$
2,037
 
Changes in goodwill
Changes in goodwill during the nine months ended September 30, 2014 were as follows (in millions):

Balance at December 31, 2013
 
$
2,925
 
Discontinued operations
  
(248
)
Impairment (See Note 3)
  
(40
)
Acquisitions
  
21
 
Adjustments to the purchase price allocation for prior year acquisitions
  
20
 
Translation effect of currency changes and other
  
(71
)
Balance at September 30, 2014
 
$
2,607