Charges and Credits - Additional Information (Detail)	3 Months Ended		6 Months Ended
	Jun. 30, 2020 USD ($) Emp	Mar. 31, 2020 USD ($) Unit	Jun. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)
Charges And Credits [Line Items]
Total number of reporting units | Unit		11
Goodwill		$ 16,000,000,000.0
Goodwill impairment charge		$ 3,100,000,000
Goodwill	$ 12,954,000,000			$ 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		$ 3,300,000,000
Charges And Credits			$ 0
Carrying Value Of Impaired Intangible Asset
Charges And Credits [Line Items]
Intangible assets		900,000,000
Carrying Value Of Asset Production Solutions | 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		600,000,000
Severance
Charges And Credits [Line Items]
Intangible assets	202,000,000
Other Restructuring
Charges And Credits [Line Items]
Intangible assets		79,000,000
Valuation allowance | North America
Charges And Credits [Line Items]
Intangible assets		164,000,000
Workforce reductions
Charges And Credits [Line Items]
Restructuring and asset impairment charges	$ 1,021,000,000.000
Reduction in workforce | Emp	21,000
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
Inventory Write Down
Charges And Credits [Line Items]
Restructuring and asset impairment charges	603,000,000
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
Other
Charges And Credits [Line Items]
Restructuring and asset impairment charges	61,000,000
Allowance For Doubtful Accounts
Charges And Credits [Line Items]
Restructuring and asset impairment charges	42,000,000
Repurchase of bonds
Charges And Credits [Line Items]
Restructuring and asset impairment charges	40,000,000
Postretirement Benefits Curtailment Gain
Charges And Credits [Line Items]
Restructuring and asset impairment charges	$ 69,000,000
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		$ 1,100,000,000
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%
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
Goodwill		$ 11,500,000,000
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