Charges and Credits - Additional Information (Detail) $ in Millions	3 Months Ended
	Mar. 31, 2020 USD ($) Unit
Charges And Credits [Line Items]
Goodwill impairment charge	$ 3,100
Expected increase/decrease in discount rate assumption	0.50%
Number of reporting units fair value to be impacted | Unit	7
Intangible assets	$ 3,300
Carrying Value Of Impaired Intangible Asset
Charges And Credits [Line Items]
Intangible assets	900
Carrying Value Of Impaired Intangible Asset | North America
Charges And Credits [Line Items]
Intangible assets	1,300
North America pressure pumping asset impairments | North America
Charges And Credits [Line Items]
Intangible assets	600
Severance
Charges And Credits [Line Items]
Intangible assets	202
Other Restructuring
Charges And Credits [Line Items]
Intangible assets	79
Valuation allowance | North America
Charges And Credits [Line Items]
Intangible assets	164
Cameron
Charges And Credits [Line Items]
Intangible assets	2,200
Smith International Inc Smith Aand Geoservices
Charges And Credits [Line Items]
Intangible assets	$ 1,100
Minimum
Charges And Credits [Line Items]
Discount rate utilized	12.00%
Maximum
Charges And Credits [Line Items]
Discount rate utilized	13.50%
Expected percentage change in fair value of reporting units	5.00%