Segment Information - Schedule of Segment Reporting Information, by Segment (Detail) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Segment Reporting Information [Line Items]
Revenue		$ 7,879	$ 7,829
Income Before Taxes		509	643
Pretax operating income		908	974
Interest expense		147	143
Reservoir Characterization
Segment Reporting Information [Line Items]
Revenue		1,543	1,559
Drilling
Segment Reporting Information [Line Items]
Revenue		2,387	2,126
Production
Segment Reporting Information [Line Items]
Revenue		2,890	2,956
Cameron
Segment Reporting Information [Line Items]
Revenue		1,174	1,310
Operating Segments
Segment Reporting Information [Line Items]
Revenue		7,879	7,829
Interest income		1	3
Interest expense		11	12
Operating Segments | Reservoir Characterization
Segment Reporting Information [Line Items]
Revenue		1,543	1,559
Income Before Taxes		293	306
Operating Segments | Drilling
Segment Reporting Information [Line Items]
Revenue		2,387	2,126
Income Before Taxes		307	293
Operating Segments | Production
Segment Reporting Information [Line Items]
Revenue		2,890	2,956
Income Before Taxes		217	217
Operating Segments | Cameron
Segment Reporting Information [Line Items]
Revenue		1,174	1,310
Income Before Taxes		137	166
Eliminations & other
Segment Reporting Information [Line Items]
Revenue		(115)	(122)
Income Before Taxes		(46)	(8)
Corporate & other	[1]	(273)	(225)
Interest income	[2]	10	25
Interest expense	[3]	$ (136)	$ (131)

[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 2019; $3 million in 2018).

[3] Interest expense excludes amounts which are included in the segments’ income ($11 million in 2019; $12 million in 2018).