Charges and Credits - Additional Information (Detail)		3 Months Ended				6 Months Ended	9 Months Ended
	Aug. 31, 2019 USD ($) Unit	Sep. 30, 2020 USD ($)	Jun. 30, 2020 USD ($) Emp	Mar. 31, 2020 USD ($) Unit	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Sep. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)
Charges And Credits [Line Items]
Total number of reporting units | Unit	17			11
Goodwill				$ 16,000,000,000.0
Goodwill impairment charge				$ 3,100,000,000
Goodwill	$ 25,000,000,000.0	$ 12,968,000,000						$ 16,042,000,000
Expected increase/decrease in discount rate assumption				0.50%
Number of reporting units fair value to be impacted | Unit				7
Intangible assets	1,085,000,000.000			$ 3,300,000,000
Restructuring and asset impairment charges			$ 40,000,000
Expected increase in discount rate assumption					0.50%
Increase in goodwill impairment charge					$ 300,000,000
Expected decrease in discount rate assumption					0.50%
Decrease in goodwill impairment charge					$ 400,000,000
Charges And Credits					11,979,000,000	$ 0
North America
Charges And Credits [Line Items]
Intangible assets	243,000,000
Carrying Value Of Impaired Intangible Asset
Charges And Credits [Line Items]
Intangible assets				900,000,000
Carrying Value Of Impaired Intangible Asset | North America
Charges And Credits [Line Items]
Intangible assets				1,300,000,000
North America pressure pumping asset impairments | North America
Charges And Credits [Line Items]
Intangible assets	1,575,000,000			600,000,000
Severance
Charges And Credits [Line Items]
Intangible assets	13,000,000			202,000,000			$ 62,000,000
Severance | North America
Charges And Credits [Line Items]
Intangible assets	10,000,000
Severance | Argentina
Charges And Credits [Line Items]
Intangible assets					29,000,000
Other Restructuring
Charges And Credits [Line Items]
Intangible assets				79,000,000			45,000,000
Valuation allowance | North America
Charges And Credits [Line Items]
Intangible assets				164,000,000
Asset Performance Solutions Investments | Latin America
Charges And Credits [Line Items]
Restructuring and asset impairment charges			730,000,000
Fixed Asset Impairments
Charges And Credits [Line Items]
Restructuring and asset impairment charges			666,000,000
Fixed Asset Impairments | North America
Charges And Credits [Line Items]
Intangible assets	230,000,000
Inventory Write Down
Charges And Credits [Line Items]
Restructuring and asset impairment charges			603,000,000
Inventory Write Down | North America
Charges And Credits [Line Items]
Intangible assets	70,000,000
Right-of-use Asset Impairments
Charges And Credits [Line Items]
Restructuring and asset impairment charges			311,000,000
Costs Associated With Exiting Certain Activities
Charges And Credits [Line Items]
Restructuring and asset impairment charges			205,000,000
Multiclient Seismic Data Impairment
Charges And Credits [Line Items]
Restructuring and asset impairment charges			156,000,000
Allowance For Doubtful Accounts
Charges And Credits [Line Items]
Restructuring and asset impairment charges			42,000,000
Postretirement Benefits Curtailment Gain
Charges And Credits [Line Items]
Restructuring and asset impairment charges			69,000,000
Facility Exit Costs
Charges And Credits [Line Items]
Restructuring charges		254,000,000
Workforce reductions
Charges And Credits [Line Items]
Restructuring and asset impairment charges			$ 1,021,000,000.000
Reduction in workforce | Emp			21,000
Restructuring charges		63,000,000
Other
Charges And Credits [Line Items]
Restructuring and asset impairment charges			$ 60,000,000
Restructuring charges		$ 33,000,000
Charges of Pressure Pumping Equipment
Charges And Credits [Line Items]
Intangible assets	1,324,000,000
Operating Lease Right-of-use Asset
Charges And Credits [Line Items]
Intangible assets	98,000,000
Supplies Expense
Charges And Credits [Line Items]
Intangible assets	121,000,000
Inventory Charges
Charges And Credits [Line Items]
Intangible assets	19,000,000
Charges Related to Other Businesses | North America
Charges And Credits [Line Items]
Intangible assets	310,000,000
Production Related Impairment or Charges | Argentina
Charges And Credits [Line Items]
Intangible assets					127,000,000
Asset Impairment Charges | Argentina
Charges And Credits [Line Items]
Intangible assets					72,000,000
Devaluation Charge | Argentina
Charges And Credits [Line Items]
Intangible assets					$ 26,000,000
Equity Method Investment, Other Than Temporary Impairment
Charges And Credits [Line Items]
Intangible assets							231,000,000
Carrying Value of APS
Charges And Credits [Line Items]
Intangible assets							294,000,000
Restructuring Charges
Charges And Credits [Line Items]
Intangible assets							242,000,000
Acceleration of Stock-based Compensation Expense Associated With Certain Individuals
Charges And Credits [Line Items]
Intangible assets							57,000,000
Business Divestiture Costs
Charges And Credits [Line Items]
Intangible assets							49,000,000
Debt Instrument Premium Paid on Repurchase
Charges And Credits [Line Items]
Intangible assets							$ 29,000,000
Cameron
Charges And Credits [Line Items]
Intangible assets				2,200,000,000
Smith International Inc Smith Aand Geoservices
Charges And Credits [Line Items]
Intangible assets	$ 842,000,000			$ 1,100,000,000
Minimum
Charges And Credits [Line Items]
Discount rate utilized				12.00%	12.50%
Maximum
Charges And Credits [Line Items]
Discount rate utilized				13.50%	14.00%
Expected percentage change in fair value of reporting units				5.00%
Four Reporting Units [Member]
Charges And Credits [Line Items]
Total number of reporting units | Unit				4
Goodwill				$ 4,500,000,000
Seven Reporting Units [Member]
Charges And Credits [Line Items]
Total number of reporting units | Unit	7			7
Goodwill				$ 11,500,000,000
Goodwill	$ 13,800,000,000
Six Reporting Units
Charges And Credits [Line Items]
Total number of reporting units | Unit				6
Goodwill				$ 8,400,000,000
Six Reporting Units | Minimum
Charges And Credits [Line Items]
Goodwill				200,000,000
Six Reporting Units | Maximum
Charges And Credits [Line Items]
Goodwill				$ 5,000,000,000.0
Ten Reporting Units
Charges And Credits [Line Items]
Total number of reporting units | Unit	10
Goodwill	$ 11,200,000,000
Nine Reporting Units
Charges And Credits [Line Items]
Total number of reporting units | Unit	9
Goodwill impairment charge	$ 8,800,000,000
Three Reporting Units
Charges And Credits [Line Items]
Total number of reporting units | Unit	3
Goodwill	$ 1,500,000,000
Three Reporting Units | Minimum
Charges And Credits [Line Items]
Goodwill	400,000,000
Three Reporting Units | Maximum
Charges And Credits [Line Items]
Goodwill	$ 600,000,000
Tenth Reporting Unit
Charges And Credits [Line Items]
Total number of reporting units | Unit	10
Goodwill	$ 900,000,000