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Goodwill - Changes in Carrying Amount of Goodwill (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Goodwill [Line Items]
Goodwill, Beginning Balance	$ 24,990	$ 15,605
Acquisitions	94	9,013
Other acquisitions		345
Impact of changes in exchange rates	34	27
Goodwill, Ending Balance	25,118	24,990
Cameron
Goodwill [Line Items]
Goodwill, Beginning Balance	5,417
Acquisitions	24	5,563
Reallocation		(146)
Impact of changes in exchange rates	6
Goodwill, Ending Balance	5,447	5,417
Operating Segments | Reservoir Characterization
Goodwill [Line Items]
Goodwill, Beginning Balance	4,820	3,798
Acquisitions	21	790
Other acquisitions		79
Reallocation		146
Impact of changes in exchange rates	7	7
Goodwill, Ending Balance	4,848	4,820
Operating Segments | Drilling
Goodwill [Line Items]
Goodwill, Beginning Balance	10,114	8,584
Acquisitions	3	1,490
Other acquisitions		24
Impact of changes in exchange rates	9	16
Goodwill, Ending Balance	10,126	10,114
Operating Segments | Production
Goodwill [Line Items]
Goodwill, Beginning Balance	4,639	3,223
Acquisitions	46	1,170
Other acquisitions		242
Impact of changes in exchange rates	12	4
Goodwill, Ending Balance	$ 4,697	$ 4,639

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.

+ References

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-Publisher FASB
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-SubTopic 20
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+ References

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+ References

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+ References

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+ References

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