Goodwill - Changes in Carrying Amount of Goodwill (Detail) $ in Millions	9 Months Ended
	Sep. 30, 2020 USD ($)
Goodwill [Line Items]
Goodwill, Beginning Balance	$ 16,042
Impairment (See Note 2)	(3,070)
Impact of changes in exchange rates and other	(4)
Goodwill, Ending Balance	12,968
Cameron
Goodwill [Line Items]
Goodwill, Beginning Balance	441
Impairment (See Note 2)	(183)
Impact of changes in exchange rates and other	3
Goodwill, Ending Balance	261
Operating Segments | Reservoir Characterization
Goodwill [Line Items]
Goodwill, Beginning Balance	4,560
Goodwill, Ending Balance	4,560
Operating Segments | Drilling
Goodwill [Line Items]
Goodwill, Beginning Balance	7,092
Impairment (See Note 2)	(1,659)
Impact of changes in exchange rates and other	10
Goodwill, Ending Balance	5,443
Operating Segments | Production
Goodwill [Line Items]
Goodwill, Beginning Balance	3,949
Impairment (See Note 2)	(1,228)
Impact of changes in exchange rates and other	(17)
Goodwill, Ending Balance	$ 2,704