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

Millions of dollars
Three Months Ended
September 30
Nine Months Ended
September 30
Revenue by segment:
2019
2018
2019
2018
Completion and Production
$
3,506

$
4,170

$
10,973

$
12,141

Drilling and Evaluation
2,044

2,002

6,244

5,918

Total revenue
$
5,550

$
6,172

$
17,217

$
18,059

Revenue by geographic region:
 
 
 
 
North America
$
2,949

$
3,739

$
9,551

$
11,090

Latin America
608

522

1,766

1,458

Europe/Africa/CIS
831

757

2,402

2,199

Middle East/Asia
1,162

1,154

3,498

3,312

Total revenue
$
5,550

$
6,172

$
17,217

$
18,059