Goodwill - Summary of Goodwill (Detail) $ in Millions	9 Months Ended
Sep. 30, 2019 USD ($)
Goodwill [Line Items]
Goodwill, Beginning Balance	$ 24,931
Impairment	(8,828)
Impact of changes in exchange rates and other	9
Goodwill, Ending Balance	16,112
Cameron
Goodwill [Line Items]
Goodwill, Beginning Balance	5,439
Impairment	(5,001)
Goodwill, Ending Balance	438
Operating Segments \| Reservoir Characterization
Goodwill [Line Items]
Goodwill, Beginning Balance	4,703
Impairment	(97)
Impact of changes in exchange rates and other	7
Goodwill, Ending Balance	4,613
Operating Segments \| Drilling
Goodwill [Line Items]
Goodwill, Beginning Balance	10,111
Impairment	(3,025)
Impact of changes in exchange rates and other	3
Goodwill, Ending Balance	7,089
Operating Segments \| Production
Goodwill [Line Items]
Goodwill, Beginning Balance	4,678
Impairment	(705)
Impact of changes in exchange rates and other	(1)
Goodwill, Ending Balance	$ 3,972

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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Amount of increase (decrease) from foreign currency translation adjustments and purchase accounting adjustments 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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