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Goodwill
 12 Months Ended
Dec. 31, 2015
Goodwill And Intangible Assets Disclosure [Abstract]  
Goodwill

8. Goodwill

The changes in the carrying amount of goodwill by reporting unit were as follows:

 

 

(Stated in millions)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Reservoir

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Characterization

 

 

Drilling

 

 

Production

 

 

Total

 

Balance, January 1, 2014...........................

$

3,737

 

 

$

8,315

 

 

$

2,654

 

 

$

14,706

 

Acquisitions....................................

 

15

 

 

 

271

 

 

 

551

 

 

 

837

 

Reallocation....................................

 

83

 

 

 

(83

)

 

 

-

 

 

 

-

 

Impact of changes in exchange rates

 

(23

)

 

 

(15

)

 

 

(18

)

 

 

(56

)

Balance, December 31, 2014.........................

 

3,812

 

 

 

8,488

 

 

 

3,187

 

 

 

15,487

 

Acquisitions....................................

 

38

 

 

 

130

 

 

 

76

 

 

 

244

 

Impact of changes in exchange rates....................

 

(52

)

 

 

(34

)

 

 

(40

)

 

 

(126

)

Balance, December 31, 2015.........................

$

3,798

 

 

$

8,584

 

 

$

3,223

 

 

$

15,605