Segment Information - Summary of North America and International Revenue Disaggregated 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
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
Other
Segment Reporting Information [Line Items]
Revenue	(115)	(122)
Operating Segments
Segment Reporting Information [Line Items]
Revenue	7,879	7,829
Operating Segments | Reservoir Characterization
Segment Reporting Information [Line Items]
Revenue	1,543	1,559
Operating Segments | Drilling
Segment Reporting Information [Line Items]
Revenue	2,387	2,126
Operating Segments | Production
Segment Reporting Information [Line Items]
Revenue	2,890	2,956
Operating Segments | Cameron
Segment Reporting Information [Line Items]
Revenue	1,174	1,310
Eliminations & other
Segment Reporting Information [Line Items]
Revenue	104	111
Eliminations & other | Reservoir Characterization
Segment Reporting Information [Line Items]
Revenue	75	137
Eliminations & other | Drilling
Segment Reporting Information [Line Items]
Revenue	54	49
Eliminations & other | Production
Segment Reporting Information [Line Items]
Revenue	1	1
Eliminations & other | Cameron
Segment Reporting Information [Line Items]
Revenue	46	24
Eliminations & other | Other
Segment Reporting Information [Line Items]
Revenue	(72)	(100)
North America | Operating Segments
Segment Reporting Information [Line Items]
Revenue	2,738	2,835
North America | Operating Segments | Reservoir Characterization
Segment Reporting Information [Line Items]
Revenue	216	222
North America | Operating Segments | Drilling
Segment Reporting Information [Line Items]
Revenue	578	564
North America | Operating Segments | Production
Segment Reporting Information [Line Items]
Revenue	1,373	1,500
North America | Operating Segments | Cameron
Segment Reporting Information [Line Items]
Revenue	560	550
North America | Operating Segments | Other
Segment Reporting Information [Line Items]
Revenue	11	(1)
International | Operating Segments
Segment Reporting Information [Line Items]
Revenue	5,037	4,883
International | Operating Segments | Reservoir Characterization
Segment Reporting Information [Line Items]
Revenue	1,252	1,200
International | Operating Segments | Drilling
Segment Reporting Information [Line Items]
Revenue	1,755	1,513
International | Operating Segments | Production
Segment Reporting Information [Line Items]
Revenue	1,516	1,455
International | Operating Segments | Cameron
Segment Reporting Information [Line Items]
Revenue	568	736
International | Operating Segments | Other
Segment Reporting Information [Line Items]
Revenue	$ (54)	$ (21)