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Fixed Assets (Tables)
12 Months Ended
Dec. 31, 2017
Property Plant And Equipment [Abstract]  
Summary of Fixed Assets

A summary of fixed assets follows:

 

(Stated in millions)

 

 

 

 

 

 

 

 

 

 

2017

 

 

2016

 

Land

$

428

 

 

$

479

 

Buildings & improvements

 

5,122

 

 

 

4,849

 

Machinery & equipment

 

32,160

 

 

 

33,834

 

Seismic vessels

 

103

 

 

 

846

 

 

 

37,813

 

 

 

40,008

 

Less: Accumulated depreciation

 

26,237

 

 

 

27,187

 

 

$

11,576

 

 

$

12,821