Business Segment and Geographic Information (Tables)
 9 Months Ended
Sep. 30, 2017
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
2017
2016
2017
2016
Revenue:
 
 
 
 
Completion and Production
$
3,537

$
2,176

$
9,273

$
6,614

Drilling and Evaluation
1,907

1,657

5,407

5,252

Total revenue
$
5,444

$
3,833

$
14,680

$
11,866

Operating income (loss):
 
 
 
 
Completion and Production
$
525

$
24

$
1,069

$
22

Drilling and Evaluation
180

151

427

546

Total operations
705

175

1,496

568

Corporate and other (a)
(71
)
(47
)
(251
)
(4,210
)
Impairments and other charges
—

—

(262
)
(3,189
)
Total operating income (loss)
$
634

$
128

$
983

$
(6,831
)
Interest expense, net of interest income
(115
)
(141
)
(478
)
(502
)
Other, net
(23
)
(39
)
(67
)
(117
)
Income (loss) from continuing operations before income taxes
$
496

$
(52
)
$
438

$
(7,450
)

(a) Corporate and other includes certain expenses not attributable to a particular business segment such as costs related to support functions and corporate executives. Other items include amortization expense associated with intangible assets recorded as a result of our acquisitions in the third quarter of 2017 and merger-related costs and termination fee incurred during the nine months ended September 30, 2016.