Charges and Credits - Additional Information (Detail) $ in Millions	3 Months Ended
	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Jun. 30, 2020 USD ($) Emp	Mar. 31, 2020 USD ($) Unit
Charges And Credits [Line Items]
Unrealized gain on investments pretax	$ 47
Unrealized gain on investments after tax	36
Investments, fair value	$ 55
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
Workforce reductions
Charges And Credits [Line Items]
Intangible assets			$ 1,021
Reduction in workforce | Emp			21,000
Restructuring Charges		$ 63
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			60
Restructuring Charges		33
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
Facility Exit Charges
Charges And Credits [Line Items]
Restructuring Charges		$ 254
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%