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Revenue (Tables)
 6 Months Ended
Jun. 30, 2019
Revenue [Abstract]  
Disaggregation of Revenue The following table presents information on our disaggregated revenue.

Millions of dollars
Three Months Ended
June 30
Six Months Ended
June 30
Revenue by segment:
2019
2018
2019
2018
Completion and Production
$
3,805

$
4,164

$
7,467

$
7,971

Drilling and Evaluation
2,125

1,983

4,200

3,916

Total revenue
$
5,930

$
6,147

$
11,667

$
11,887

Revenue by geographic region:
 
 
 
 
North America
$
3,327

$
3,834

$
6,602

$
7,351

Latin America
571

479

1,158

936

Europe/Africa/CIS
823

726

1,571

1,442

Middle East/Asia
1,209

1,108

2,336

2,158

Total revenue
$
5,930

$
6,147

$
11,667

$
11,887