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Inventories
3 Months Ended
Mar. 31, 2019
Inventory Disclosure [Abstract]  
Inventories

3.   Inventories

A summary of inventories, which are stated at the lower of average cost or net realizable value, is as follows:  

 

(Stated in millions)

 

 

 

 

 

 

 

 

 

 

Mar. 31,

 

 

Dec. 31,

 

 

2019

 

 

2018

 

Raw materials & field materials

$

1,877

 

 

$

1,803

 

Work in progress

 

549

 

 

 

519

 

Finished goods

 

1,798

 

 

 

1,688

 

 

$

4,224

 

 

$

4,010