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Goodwill (Tables)
 3 Months Ended
Mar. 31, 2016
Goodwill And Intangible Assets Disclosure [Abstract]  
Changes in Carrying Amount of Goodwill

The changes in the carrying amount of goodwill by reporting unit for the three months ended March 31, 2016 were as follows:

 

 

(Stated in millions)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Reservoir

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Characterization

 

 

Drilling

 

 

Production

 

 

Total

 

Balance at December 31, 2015

$

3,798

 

 

$

8,584

 

 

$

3,223

 

 

$

15,605

 

Acquisitions

 

-

 

 

 

-

 

 

 

24

 

 

 

24

 

Impact of changes in exchange rates

 

9

 

 

 

4

 

 

 

7

 

 

 

20

 

Balance at March 31, 2016

$

3,807

 

 

$

8,588

 

 

$

3,254

 

 

$

15,649