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Revenue (Tables)
 3 Months Ended
Mar. 31, 2021
Revenue [Abstract]  
Disaggregation of Revenue
The following table presents information on our disaggregated revenue.

Millions of dollarsThree Months Ended
March 31
Revenue by segment:20212020
Completion and Production$1,870 $2,962 
Drilling and Evaluation1,581 2,075 
Total revenue$3,451 $5,037 
Revenue by geographic region:
North America$1,404 $2,460 
Latin America535 516 
Europe/Africa/CIS634 831 
Middle East/Asia878 1,230 
Total revenue$3,451 $5,037