Segment Information - Summary of North America and International Revenue Disaggregated by Group (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Segment Reporting Information [Line Items]
Revenue	$ 7,829	$ 6,894
Reservoir Characterization
Segment Reporting Information [Line Items]
Revenue	1,556	1,618
Drilling
Segment Reporting Information [Line Items]
Revenue	2,126	1,985
Production
Segment Reporting Information [Line Items]
Revenue	2,959	2,187
Cameron
Segment Reporting Information [Line Items]
Revenue	1,310	1,229
Other
Segment Reporting Information [Line Items]
Revenue	(122)	(125)
Operating Segments
Segment Reporting Information [Line Items]
Revenue	7,829	6,894
Operating Segments | Reservoir Characterization
Segment Reporting Information [Line Items]
Revenue	1,556	1,618
Operating Segments | Drilling
Segment Reporting Information [Line Items]
Revenue	2,126	1,985
Operating Segments | Production
Segment Reporting Information [Line Items]
Revenue	2,959	2,187
Operating Segments | Cameron
Segment Reporting Information [Line Items]
Revenue	1,310	1,229
Eliminations & other
Segment Reporting Information [Line Items]
Revenue	111	101
Eliminations & other | Reservoir Characterization
Segment Reporting Information [Line Items]
Revenue	137	120
Eliminations & other | Drilling
Segment Reporting Information [Line Items]
Revenue	49	62
Eliminations & other | Production
Segment Reporting Information [Line Items]
Revenue	1	(3)
Eliminations & other | Cameron
Segment Reporting Information [Line Items]
Revenue	24	(7)
Eliminations & other | Other
Segment Reporting Information [Line Items]
Revenue	(100)	(71)
North America | Operating Segments
Segment Reporting Information [Line Items]
Revenue	2,835	1,871
North America | Operating Segments | Reservoir Characterization
Segment Reporting Information [Line Items]
Revenue	222	231
North America | Operating Segments | Drilling
Segment Reporting Information [Line Items]
Revenue	564	455
North America | Operating Segments | Production
Segment Reporting Information [Line Items]
Revenue	1,500	739
North America | Operating Segments | Cameron
Segment Reporting Information [Line Items]
Revenue	550	444
North America | Operating Segments | Other
Segment Reporting Information [Line Items]
Revenue	(1)	2
International | Operating Segments
Segment Reporting Information [Line Items]
Revenue	4,883	4,922
International | Operating Segments | Reservoir Characterization
Segment Reporting Information [Line Items]
Revenue	1,197	1,267
International | Operating Segments | Drilling
Segment Reporting Information [Line Items]
Revenue	1,513	1,468
International | Operating Segments | Production
Segment Reporting Information [Line Items]
Revenue	1,458	1,451
International | Operating Segments | Cameron
Segment Reporting Information [Line Items]
Revenue	736	792
International | Operating Segments | Other
Segment Reporting Information [Line Items]
Revenue	$ (21)	$ (56)