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Business Segment and Geographic Information
 9 Months Ended
Sep. 30, 2013
Segment Reporting [Abstract]  
Business Segment and Geographic Information
Business Segment and Geographic Information
We operate under two divisions, which form the basis for the two operating segments we report: the Completion and Production segment and the Drilling and Evaluation segment.
The following table presents information on our business segments. “Corporate and other” includes expenses related to support functions and corporate executives. Also included are certain gains and losses not attributable to a particular business segment (such as the loss contingencies related to the Macondo well incident recorded during the first quarters of 2013 and 2012 and a $55 million charitable contribution expensed during the second quarter of 2013).
Intersegment revenue was immaterial. Our equity in earnings and losses of unconsolidated affiliates that are accounted for by the equity method of accounting are included in revenue and operating income of the applicable segment.
 
Three Months Ended
September 30
Nine Months Ended
September 30
Millions of dollars
2013
2012
2013
2012
Revenue:
 
 
 
 
Completion and Production
$
4,501

$
4,293

$
12,964

$
13,043

Drilling and Evaluation
2,971

2,818

8,799

8,170

Total revenue
$
7,472

$
7,111

$
21,763

$
21,213

Operating income:
 
 
 
 
Completion and Production
$
763

$
591

$
2,110

$
2,541

Drilling and Evaluation
450

430

1,272

1,191

Total operations
1,213

1,021

3,382

3,732

Corporate and other
(105
)
(67
)
(1,388
)
(554
)
Total operating income
$
1,108

$
954

$
1,994

$
3,178

Interest expense, net of interest income
(91
)
(71
)
(233
)
(225
)
Other, net
(12
)
(6
)
(37
)
(30
)
Income from continuing operations before income taxes
$
1,005

$
877

$
1,724

$
2,923



Receivables
As of September 30, 2013, 33% of our gross trade receivables were from customers in the United States. As of December 31, 2012, 36% of our gross trade receivables were from customers in the United States. No other country or single customer accounted for more than 10% of our gross trade receivables at these dates.