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Goodwill - Changes in Carrying Amount of Goodwill (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Goodwill [Line Items]
Goodwill, Beginning Balance	$ 25,118	$ 24,990
Acquisitions	39	94
Business divestiture	(175)
Impact of changes in exchange rates	(51)	34
Goodwill, Ending Balance	24,931	25,118
Cameron
Goodwill [Line Items]
Goodwill, Beginning Balance	5,447	5,417
Acquisitions		24
Impact of changes in exchange rates	(8)	6
Goodwill, Ending Balance	5,439	5,447
Operating Segments | Reservoir Characterization
Goodwill [Line Items]
Goodwill, Beginning Balance	4,848	4,820
Acquisitions	39	21
Business divestiture	(175)
Impact of changes in exchange rates	(9)	7
Goodwill, Ending Balance	4,703	4,848
Operating Segments | Drilling
Goodwill [Line Items]
Goodwill, Beginning Balance	10,126	10,114
Acquisitions		3
Impact of changes in exchange rates	(15)	9
Goodwill, Ending Balance	10,111	10,126
Operating Segments | Production
Goodwill [Line Items]
Goodwill, Beginning Balance	4,697	4,639
Acquisitions		46
Impact of changes in exchange rates	(19)	12
Goodwill, Ending Balance	$ 4,678	$ 4,697

X

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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