Charges and Credits - Additional Information (Detail) $ in Millions	3 Months Ended
	Jun. 30, 2020 USD ($) Emp	Mar. 31, 2020 USD ($) 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
Severance
Charges And Credits [Line Items]
Intangible assets	$ 1,021
Reduction in workforce | Emp	21,000
Asset Performance Solutions Investments | Latin America
Charges And Credits [Line Items]
Intangible assets	$ 730
Fixed Asset Impairment
Charges And Credits [Line Items]
Intangible assets	666
Inventory Write Down
Charges And Credits [Line Items]
Intangible assets	603
Right-of-use Asset Impairments
Charges And Credits [Line Items]
Intangible assets	311
Costs Associated With Exiting Certain Activities1
Charges And Credits [Line Items]
Intangible assets	205
Multiclient Seismic Data Impairment
Charges And Credits [Line Items]
Intangible assets	156
Other
Charges And Credits [Line Items]
Intangible assets	61
Allowance For Doubtful Accounts
Charges And Credits [Line Items]
Intangible assets	42
Repurchase of bonds
Charges And Credits [Line Items]
Intangible assets	40
Postretirement Benefits Curtailment Gain
Charges And Credits [Line Items]
Intangible assets	$ 69
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%