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Goodwill
 9 Months Ended
Sep. 30, 2013
Goodwill

8. Goodwill

The changes in the carrying amount of goodwill by reporting unit for the nine months ended September 30, 2013 were as follows:

 

 

(Stated in millions)

 

 

Reservoir
Characterization

 

 

Drilling

 

 

Production

 

 

Total

 

Balance at December 31, 2012             

$

  3,760

 

 

$

  8,337

 

 

$

  2,488

 

 

$

  14,585

 

Acquisitions             

 

  4

 

 

 

  3

 

 

 

  247

 

 

 

  254

 

Divestiture of business             

 

—

 

 

 

—

 

 

 

(150

)

 

 

(150

)

Impact of changes in exchange rates             

 

(24

)

 

 

(23

)

 

 

(19

)

 

 

(66

)

Balance at September 30, 2013             

$

  3,740

 

 

$

  8,317

 

 

$

  2,566

 

 

$

  14,623