Charges and Credits - Additional Information (Detail) $ in Millions			3 Months Ended								12 Months Ended
	Oct. 01, 2019 USD ($)	Aug. 31, 2019 USD ($) Unit	Dec. 31, 2020 USD ($)	Sep. 30, 2020 USD ($)	Jun. 30, 2020 USD ($) Emp	Mar. 31, 2020 USD ($) Unit	Dec. 31, 2019 USD ($)	Sep. 30, 2019 USD ($)	Dec. 31, 2018 USD ($)	Jun. 30, 2018 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Charges And Credits [Line Items]
Total number of reporting units | Unit		17				11
Goodwill						$ 16,000.0
Goodwill impairment charge						$ 3,100.0
Goodwill		$ 25,000.0	$ 12,980.0	$ 12,968.0			$ 16,042.0		$ 24,931.0		$ 12,980.0	$ 16,042.0	$ 24,931.0
Expected increase/decrease in discount rate assumption						50.00%
Number of reporting units fair value to be impacted | Unit						7
Intangible assets		1,085.0				$ 3,300.0
Restructuring Charges							104.0
Gains on sales of businesses											104.0	247.0	215.0
Expected increase in discount rate assumption								0.50%
Increase in goodwill impairment charge								$ 300.0
Expected decrease in discount rate assumption								0.50%
Decrease in goodwill impairment charge								$ 400.0
Benefits Paid											257.0
Non-cash settlement charge							37.0				37.0
Debt instrument, repurchase amount							22.0					22.0
Net proceeds from divestitures											$ 434.0	$ 348.0
Charges and credits							12,191.0						124.0
Rockwell Automation
Charges And Credits [Line Items]
Percentage of equity ownership interest	53.00%
Schlumberger
Charges And Credits [Line Items]
Percentage of equity ownership interest	47.00%
Cash recieved	$ 238.0
Gain of deconsolidation in formation of joint venture							247.0
Liberty Oilfield Services Inc.
Charges And Credits [Line Items]
Percentage of equity ownership interest			37.00%								37.00%
Gains on sales of businesses			$ 104.0
Investment			700.0								$ 700.0
Unrealized Gain on Investments			39.0
Investments, Fair Value			43.0								$ 43.0
Disposition			$ 62.0
North America
Charges And Credits [Line Items]
Intangible assets		243.0
Carrying Value Of Impaired Intangible Asset
Charges And Credits [Line Items]
Intangible assets						900.0
Carrying Value Of Impaired Intangible Asset | North America
Charges And Credits [Line Items]
Intangible assets						1,300.0
North America pressure pumping asset impairments | North America
Charges And Credits [Line Items]
Intangible assets		1,575.0				600.0
Severance
Charges And Credits [Line Items]
Intangible assets		13.0				202.0		62.0
Restructuring Charges							68.0
Severance | North America
Charges And Credits [Line Items]
Intangible assets		10.0
Severance | Argentina
Charges And Credits [Line Items]
Intangible assets								29.0
Other Restructuring
Charges And Credits [Line Items]
Intangible assets						79.0		45.0
Valuation allowance | North America
Charges And Credits [Line Items]
Intangible assets						164.0
Workforce reductions
Charges And Credits [Line Items]
Intangible assets					$ 1,021.0
Reduction in workforce | Emp					21,000
Restructuring Charges				63.0
Charges and credits													164.0
Workforce reductions | Impairments and Other
Charges And Credits [Line Items]
Charges and credits										$ 184.0
Asset Performance Solutions Investments | Latin America
Charges And Credits [Line Items]
Intangible assets					$ 730.0
Fixed Asset Impairment
Charges And Credits [Line Items]
Intangible assets					666.0
Fixed Asset Impairment | North America
Charges And Credits [Line Items]
Intangible assets		230.0
Inventory Write Down
Charges And Credits [Line Items]
Intangible assets					603.0
Inventory Write Down | North America
Charges And Credits [Line Items]
Intangible assets		70.0
Right Of Use Asset Impairments
Charges And Credits [Line Items]
Intangible assets					311.0
Costs Associated With Exiting Certain Activities1
Charges And Credits [Line Items]
Intangible assets					205.0
Multiclient seismic data impairment
Charges And Credits [Line Items]
Intangible assets					156.0
Other
Charges And Credits [Line Items]
Intangible assets					60.0
Restructuring Charges				33.0
Allowance For Doubtful Accounts
Charges And Credits [Line Items]
Intangible assets					42.0
Repurchase of bonds
Charges And Credits [Line Items]
Intangible assets					40.0
Postretirement Benefits Curtailment Gain
Charges And Credits [Line Items]
Intangible assets					$ 69.0
Facility exit charges
Charges And Credits [Line Items]
Restructuring Charges				$ 254.0
Charges of Pressure Pumping Equipment
Charges And Credits [Line Items]
Intangible assets		1,324.0
Operating Lease Right-of-use Asset
Charges And Credits [Line Items]
Intangible assets		98.0
Operating Lease Right-of-use Asset | North America
Charges And Credits [Line Items]
Restructuring Charges							55.0
Supplies Expense
Charges And Credits [Line Items]
Intangible assets		121.0
Inventory Charges
Charges And Credits [Line Items]
Intangible assets		19.0
Charges Related to Other Businesses | North America
Charges And Credits [Line Items]
Intangible assets		310.0
Production Related Impairment or Charges | Argentina
Charges And Credits [Line Items]
Intangible assets								127.0
Asset Impairment Charges
Charges And Credits [Line Items]
Charges and credits													156.0
Asset Impairment Charges | Argentina
Charges And Credits [Line Items]
Intangible assets								72.0
Devaluation Charge | Argentina
Charges And Credits [Line Items]
Intangible assets								26.0
Equity Method Investment, Other Than Temporary Impairment
Charges And Credits [Line Items]
Intangible assets								231.0
Carrying Value of Asset Production Solutions
Charges And Credits [Line Items]
Intangible assets								294.0
Restructuring Charges
Charges And Credits [Line Items]
Intangible assets								242.0
Acceleration of Stock-based Compensation Expense Associated With Certain Individuals
Charges And Credits [Line Items]
Intangible assets								57.0
Business Divestiture Costs
Charges And Credits [Line Items]
Intangible assets								49.0
Debt Instrument Premium Paid on Repurchase
Charges And Credits [Line Items]
Intangible assets								$ 29.0
Facility and other exit costs | North America
Charges And Credits [Line Items]
Restructuring Charges							225.0
Write Down Of Assets | North America
Charges And Credits [Line Items]
Restructuring Charges							123.0
Other Exit Costs | North America
Charges And Credits [Line Items]
Restructuring Charges							47.0
Sale Of Assets
Charges And Credits [Line Items]
Restructuring Charges							68.0
Facility Closure Costs
Charges And Credits [Line Items]
Restructuring Charges							$ 36.0
Marine Seismic Acquisition Business
Charges And Credits [Line Items]
Gains on sales of businesses									215.0
Net proceeds from divestitures									$ 600.0
Charges and credits													$ (196.0)
Marine Seismic Acquisition Business | Shearwater GeoServices
Charges And Credits [Line Items]
Percentage of equity ownership interest									15.00%				15.00%
Impairment of Long-Lived Assets | Impairments and Other
Charges And Credits [Line Items]
Charges and credits									$ 172.0
Cameron
Charges And Credits [Line Items]
Intangible assets						2,200.0
Smith International Inc Smith Aand Geoservices
Charges And Credits [Line Items]
Intangible assets		$ 842.0				$ 1,100.0
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%
Seven Reporting Units
Charges And Credits [Line Items]
Total number of reporting units | Unit		7				7
Goodwill						$ 11,500.0
Goodwill		$ 13,800.0
Ten Reporting Units
Charges And Credits [Line Items]
Total number of reporting units | Unit						4
Goodwill						$ 4,500.0
Six Reporting Units
Charges And Credits [Line Items]
Total number of reporting units | Unit						6
Goodwill						$ 8.4
Six Reporting Units | Minimum
Charges And Credits [Line Items]
Goodwill						200.0
Six Reporting Units | Maximum
Charges And Credits [Line Items]
Goodwill						$ 5,000.0
Ten Reporting Units
Charges And Credits [Line Items]
Total number of reporting units | Unit		10
Goodwill		$ 11,200.0
Nine Reporting Units
Charges And Credits [Line Items]
Total number of reporting units | Unit		9
Goodwill impairment charge		$ 8,800.0