Segment Information - Schedule of Segment Reporting Information, by Segment (Detail) - USD ($) $ in Millions		3 Months Ended				9 Months Ended
		Sep. 30, 2016		Sep. 30, 2015		Sep. 30, 2016		Sep. 30, 2015
Segment Reporting Information [Line Items]
Revenue		$ 7,019		$ 8,472		$ 20,703		$ 27,731
Pretax operating income		815		1,521		2,462		5,222
Interest		149		86		431		254
Income Before Taxes		200		1,253		(1,691)		3,984
Operating Segments
Segment Reporting Information [Line Items]
Interest income		7		5		20		16
Interest		14		8		40		20
Operating Segments | Reservoir Characterization
Segment Reporting Information [Line Items]
Revenue		1,689		2,380		5,044		7,545
Pretax operating income		322		616		913		1,944
Operating Segments | Drilling
Segment Reporting Information [Line Items]
Revenue		2,021		3,219		6,548		10,610
Pretax operating income		218		594		760		2,044
Operating Segments | Production
Segment Reporting Information [Line Items]
Revenue		2,083		2,915		6,529		9,679
Pretax operating income		98		327		396		1,268
Operating Segments | Cameron
Segment Reporting Information [Line Items]
Revenue		1,341				2,865
Pretax operating income		215				465
Eliminations & other
Segment Reporting Information [Line Items]
Revenue		(115)		(42)		(283)		(103)
Pretax operating income		(38)		(16)		(72)		(34)
Material Reconciling Items
Segment Reporting Information [Line Items]
Corporate & other	[1]	(267)		(198)		(679)		(587)
Interest income		24	[2]	8	[2]	61	[3]	22	[3]
Interest		(135)	[4]	$ (78)	[4]	(391)	[5]	(234)	[5]
Restructuring and other charges	[6]	$ (237)				$ (3,144)		$ (439)

[1] Comprised principally of certain corporate expenses not allocated to the segments, stock-based compensation costs, amortization expense associated with certain intangible assets (including intangible asset amortization expense resulting from the acquisition of Cameron), certain centrally managed initiatives and other nonoperating items.

[2] Interest income excludes amounts which are included in the segments’ income ($7 million in 2016; $5 million in 2015).

[3] Interest income excludes amounts which are included in the segments’ income ($20 million in 2016; $16 million in 2015).

[4] Interest expense excludes amounts which are included in the segments’ income ($14 million in 2016; $8 million in 2015).

[5] Interest expense excludes amounts which are included in the segments’ income ($40 million in 2016; $20 million in 2015).

[6] See Note 2 – Charges and Credits.