Segment Information - Summary of North America and International Revenue Disaggregated by Segment (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Segment Reporting Information [Line Items]
Revenue	$ 8,504	$ 7,905	$ 24,636	$ 22,261
Reservoir Characterization
Segment Reporting Information [Line Items]
Revenue	1,673		4,865
Drilling
Segment Reporting Information [Line Items]
Revenue	2,429		6,789
Production
Segment Reporting Information [Line Items]
Revenue	3,252		9,468
Cameron
Segment Reporting Information [Line Items]
Revenue	1,298		3,902
Other
Segment Reporting Information [Line Items]
Revenue	(148)		(388)
Operating Segments
Segment Reporting Information [Line Items]
Revenue	8,504	7,905	24,636	22,261
Operating Segments | Reservoir Characterization
Segment Reporting Information [Line Items]
Revenue	1,673	1,771	4,865	5,148
Operating Segments | Drilling
Segment Reporting Information [Line Items]
Revenue	2,429	2,120	6,789	6,212
Operating Segments | Production
Segment Reporting Information [Line Items]
Revenue	3,252	2,876	9,468	7,559
Operating Segments | Cameron
Segment Reporting Information [Line Items]
Revenue	1,298	1,297	3,902	3,791
Eliminations & other
Segment Reporting Information [Line Items]
Revenue	100	156	310	382
Eliminations & other | Reservoir Characterization
Segment Reporting Information [Line Items]
Revenue	114		385
Eliminations & other | Drilling
Segment Reporting Information [Line Items]
Revenue	68		172
Eliminations & other | Production
Segment Reporting Information [Line Items]
Revenue			4
Eliminations & other | Cameron
Segment Reporting Information [Line Items]
Revenue	25		71
Eliminations & other | Other
Segment Reporting Information [Line Items]
Revenue	(107)		(322)
North America | Operating Segments
Segment Reporting Information [Line Items]
Revenue	3,189	$ 2,602	9,164	$ 6,675
North America | Operating Segments | Reservoir Characterization
Segment Reporting Information [Line Items]
Revenue	242		733
North America | Operating Segments | Drilling
Segment Reporting Information [Line Items]
Revenue	601		1,733
North America | Operating Segments | Production
Segment Reporting Information [Line Items]
Revenue	1,725		4,919
North America | Operating Segments | Cameron
Segment Reporting Information [Line Items]
Revenue	617		1,761
North America | Operating Segments | Other
Segment Reporting Information [Line Items]
Revenue	4		18
International | Operating Segments
Segment Reporting Information [Line Items]
Revenue	5,215		15,162
International | Operating Segments | Reservoir Characterization
Segment Reporting Information [Line Items]
Revenue	1,317		3,747
International | Operating Segments | Drilling
Segment Reporting Information [Line Items]
Revenue	1,760		4,884
International | Operating Segments | Production
Segment Reporting Information [Line Items]
Revenue	1,527		4,545
International | Operating Segments | Cameron
Segment Reporting Information [Line Items]
Revenue	656		2,070
International | Operating Segments | Other
Segment Reporting Information [Line Items]
Revenue	$ (45)		$ (84)