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Business Segment and Geographic Information (Tables)
 9 Months Ended
Sep. 30, 2015
Segment Reporting [Abstract]  
Information on business segments
The following table presents information on our business segments.
 
Three Months Ended
September 30
Nine Months Ended
September 30
Millions of dollars
2015
2014
2015
2014
Revenue:
 
 
 
 
Completion and Production
$
3,200

$
5,420

$
10,890

$
14,782

Drilling and Evaluation
2,382

3,281

7,661

9,318

Total revenue
$
5,582

$
8,701

$
18,551

$
24,100

Operating income (loss):
 
 
 
 
Completion and Production
$
163

$
1,071

$
938

$
2,619

Drilling and Evaluation
401

451

1,107

1,263

Total operations
564

1,522

2,045

3,882

Corporate and other (a)
(140
)
112

(401
)
(84
)
Impairments and other charges (b)
(381
)
—

(1,895
)
—

Total operating income (loss)
$
43

$
1,634

$
(251
)
$
3,798

Interest expense, net of interest income
(99
)
(96
)
(311
)
(283
)
Other, net
(34
)
12

(281
)
(43
)
Income (loss) from continuing operations before income taxes
$
(90
)
$
1,550

$
(843
)
$
3,472


(a) Includes certain expenses not attributable to a particular business segment such as costs related to support functions and corporate executives, as well as costs related to the pending Baker Hughes acquisition incurred during the three and nine months ended September 30, 2015.
(b) Includes $228 million attributable to Completion and Production, $138 million attributable to Drilling and Evaluation, and $15 million attributable to Corporate and other for the three months ended September 30, 2015. Includes $949 million attributable to Completion and Production, $865 million attributable to Drilling and Evaluation, and $81 million attributable to Corporate and other for the nine months ended September 30, 2015.