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Segment Information - Schedule of Segment Reporting Information, by Segment (Detail) - USD ($)
$ in Millions

3 Months Ended

6 Months Ended

Jun. 30, 2018

Jun. 30, 2017

Jun. 30, 2018

Jun. 30, 2017

Segment Reporting Information [Line Items]

Revenue

$ 8,303

$ 7,462

$ 16,131

$ 14,356

Income Before Taxes

547

17

1,190

351

Pretax operating income

1,094

950

2,068

1,707

Interest expense

144

142

287

281

Reservoir Characterization

Segment Reporting Information [Line Items]

Revenue

1,636

1,759

3,192

3,377

Drilling

Segment Reporting Information [Line Items]

Revenue

2,234

2,107

4,360

4,092

Production

Segment Reporting Information [Line Items]

Revenue

3,257

2,496

6,216

4,683

Cameron

Segment Reporting Information [Line Items]

Revenue

1,295

1,265

2,605

2,494

Operating Segments

Segment Reporting Information [Line Items]

Revenue

8,303

7,462

16,131

14,356

Interest income

1

6

4

11

Interest expense

9

14

21

27

Operating Segments | Reservoir Characterization

Segment Reporting Information [Line Items]

Revenue

1,636

1,759

3,192

3,377

Income Before Taxes

350

299

657

580

Operating Segments | Drilling

Segment Reporting Information [Line Items]

Revenue

2,234

2,107

4,360

4,092

Income Before Taxes

289

302

582

531

Operating Segments | Production

Segment Reporting Information [Line Items]

Revenue

3,257

2,496

6,216

4,683

Income Before Taxes

316

221

532

331

Operating Segments | Cameron

Segment Reporting Information [Line Items]

Revenue

1,295

1,265

2,605

2,494

Income Before Taxes

166

174

332

336

Eliminations & other

Segment Reporting Information [Line Items]

Revenue

(119)

(165)

(242)

(290)

Income Before Taxes

(27)

(46)

(35)

(71)

Corporate & other

^[1]

(239)

(242)

(464)

(480)

Interest income

11

^[2]

28

^[2]

36

^[3]

52

^[3]

Interest expense

(135)

^[4]

(128)

^[4]

(266)

^[5]

(254)

^[5]

Charges and credits

^[6]

$ (184)

$ (591)

$ (184)

$ (674)

[1]	Comprised principally of certain corporate expenses not allocated to the segments, stock-based compensation costs, amortization expense associated with certain intangible assets, certain centrally managed initiatives and other nonoperating items.
[2]	Interest income excludes amounts which are included in the segments’ income ($1 million in 2018; $6 million in 2017).
[3]	Interest income excludes amounts which are included in the segments’ income ($4 million in 2018; $11 million in 2017).
[4]	Interest expense excludes amounts which are included in the segments’ income ($9 million in 2018; $14 million in 2017).
[5]	Interest expense excludes amounts which are included in the segments’ income ($21 million in 2018; $27 million in 2017).
[6]	See Note 2 – Charges and Credits.

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