Charges and Credits - Summary of Charges and Credits (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2020	Jun. 30, 2019
Charges And Credits [Line Items]
Charges and credits, Net				$ 0
Impairment and Other
Charges And Credits [Line Items]
Charges and credits, Pretax			$ 12,247,000,000
Charges and credits, Tax			(1,017,000,000)
Charges and credits, Net			$ 11,230,000,000
Goodwill | Impairment and Other
Charges And Credits [Line Items]
Charges and credits, Pretax		$ 3,070,000,000
Charges and credits, Net		3,070,000,000
Intangible assets impairment | Impairment and Other
Charges And Credits [Line Items]
Charges and credits, Pretax		3,321,000,000
Charges and credits, Tax		(815,000,000)
Charges and credits, Net		2,506,000,000
Asset Performance Solutions Investments | Impairment and Other
Charges And Credits [Line Items]
Charges and credits, Pretax	$ 730,000,000	1,264,000,000
Charges and credits, Tax	(15,000,000)	4,000,000
Charges and credits, Net	715,000,000	1,268,000,000
North America pressure pumping asset impairments | Impairment and Other
Charges And Credits [Line Items]
Charges and credits, Pretax		587,000,000
Charges and credits, Tax		(133,000,000)
Charges and credits, Net		454,000,000
Workforce reductions | Impairment and Other
Charges And Credits [Line Items]
Charges and credits, Pretax	1,021,000,000	202,000,000
Charges and credits, Tax	(71,000,000)	(7,000,000)
Charges and credits, Net	950,000,000	195,000,000
Other | Impairment and Other
Charges And Credits [Line Items]
Charges and credits, Pretax	61,000,000	79,000,000
Charges and credits, Tax	(4,000,000)	(9,000,000)
Charges and credits, Net	57,000,000	70,000,000
Valuation allowance | Impairment and Other
Charges And Credits [Line Items]
Charges and credits, Tax		164,000,000
Charges and credits, Net		$ 164,000,000
Fixed Asset Impairments | Impairment and Other
Charges And Credits [Line Items]
Charges and credits, Pretax	666,000,000
Charges and credits, Tax	(52,000,000)
Charges and credits, Net	614,000,000
Inventory Write Down | Impairment and Other
Charges And Credits [Line Items]
Charges and credits, Pretax	603,000,000
Charges and credits, Tax	(49,000,000)
Charges and credits, Net	554,000,000
Right-of-use Asset Impairments | Impairment and Other
Charges And Credits [Line Items]
Charges and credits, Pretax	311,000,000
Charges and credits, Tax	(67,000,000)
Charges and credits, Net	244,000,000
Costs Associated With Exiting Certain Activities | Impairment and Other
Charges And Credits [Line Items]
Charges and credits, Pretax	205,000,000
Charges and credits, Tax	25,000,000
Charges and credits, Net	230,000,000
Multiclient Seismic Data Impairment | Impairment and Other
Charges And Credits [Line Items]
Charges and credits, Pretax	156,000,000
Charges and credits, Tax	(2,000,000)
Charges and credits, Net	154,000,000
Repurchase of bonds | Impairment and Other
Charges And Credits [Line Items]
Charges and credits, Pretax	40,000,000
Charges and credits, Tax	(2,000,000)
Charges and credits, Net	38,000,000
Postretirement Benefits Curtailment Gain | Impairment and Other
Charges And Credits [Line Items]
Charges and credits, Pretax	(69,000,000)
Charges and credits, Tax	16,000,000
Charges and credits, Net	$ (53,000,000)