Segment Information - Schedule of Segment Reporting Information, by Segment (Detail) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Segment Reporting Information [Line Items]
Revenue		$ 6,894	$ 6,520
Income Before Taxes		334	622
Pretax operating income		757	901
Interest expense		139	133
Operating Segments
Segment Reporting Information [Line Items]
Interest income		5	6
Interest expense		13	13
Operating Segments | Reservoir Characterization
Segment Reporting Information [Line Items]
Revenue		1,618	1,719
Income Before Taxes		281	334
Operating Segments | Drilling
Segment Reporting Information [Line Items]
Revenue		1,985	2,493
Income Before Taxes		229	371
Operating Segments | Production
Segment Reporting Information [Line Items]
Revenue		2,187	2,376
Income Before Taxes		110	206
Operating Segments | Cameron
Segment Reporting Information [Line Items]
Revenue		1,229
Income Before Taxes		162
Eliminations & other
Segment Reporting Information [Line Items]
Revenue		(125)	(68)
Income Before Taxes		(25)	(10)
Material Reconciling Items
Segment Reporting Information [Line Items]
Corporate & other	[1]	(239)	(172)
Interest income	[2]	24	13
Interest expense	[3]	(126)	$ (120)
Charges and credits	[4]	$ (82)

[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. The first quarter of 2017 includes $63 million of intangible asset amortization expense resulting from the April 2016 acquisition of Cameron.

[2] Interest income excludes amounts which are included in the segments’ income ($5 million in 2017; $6 million in 2016).

[3] Interest expense excludes amounts which are included in the segments’ income ($13 million in 2017; $13 million in 2016).

[4] See Note 2 – Charges and Credits.