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Revenue (Tables)
 6 Months Ended
Jun. 30, 2018
Revenue [Abstract]  
Disaggregation of Revenue
The following table presents information on our disaggregated revenue.

REVENUE:
Three Months Ended
June 30
Six Months Ended
June 30
Millions of dollars
2018
2017
2018
2017
Completion and Production
$
4,164

$
3,132

$
7,971

$
5,736

Drilling and Evaluation
1,983

1,825

3,916

3,500

Total revenue
$
6,147

$
4,957

$
11,887

$
9,236

 
 
 
 
 
By geographic region:
 
 
 
 
North America
$
3,834

$
2,770

$
7,351

$
5,001

Latin America
479

508

936

971

Europe/Africa/CIS
726

679

1,442

1,283

Middle East/Asia
1,108

1,000

2,158

1,981

Total revenue
$
6,147

$
4,957

$
11,887

$
9,236