Charges and Credits - Summary of Charges and Credits (Detail) - USD ($)		3 Months Ended				6 Months Ended
	Apr. 02, 2016	Jun. 30, 2017	Mar. 31, 2017	Jun. 30, 2016	Mar. 31, 2016	Jun. 30, 2017
Charges And Credits [Line Items]
Charges and credits, Pretax		$ 50,000,000	$ 82,000,000	$ 2,908,000,000	$ 0	$ 674,000,000
Charges and credits, Tax				432,000,000		31,000,000
Charges and credits, Noncontolling interests						12,000,000
Charges and credits, Net		38,000,000	$ 68,000,000	2,476,000,000		631,000,000
Promissory Note Fair Value Adjustment and Other
Charges And Credits [Line Items]
Charges and credits, Pretax		460,000,000				510,000,000
Charges and credits, Noncontolling interests						12,000,000
Charges and credits, Net		$ 460,000,000				498,000,000
Merger and Integration
Charges And Credits [Line Items]
Charges and credits, Pretax	$ 185,000,000					164,000,000
Charges and credits, Tax						31,000,000
Charges and credits, Net						$ 133,000,000
Merger and Integration | Amortization of inventory fair value adjustment
Charges And Credits [Line Items]
Charges and credits, Pretax				150,000,000
Charges and credits, Tax				45,000,000
Charges and credits, Net				105,000,000
Merger and Integration | Merger-related employee benefits
Charges And Credits [Line Items]
Charges and credits, Pretax				47,000,000
Charges and credits, Tax				7,000,000
Charges and credits, Net				40,000,000
Merger and Integration | Professional fees
Charges And Credits [Line Items]
Charges and credits, Pretax				45,000,000
Charges and credits, Tax				10,000,000
Charges and credits, Net				35,000,000
Merger and Integration | Facility closure costs
Charges And Credits [Line Items]
Charges and credits, Pretax				40,000,000
Charges and credits, Tax				10,000,000
Charges and credits, Net				30,000,000
Merger and Integration | Other merger and integration-related
Charges And Credits [Line Items]
Charges and credits, Pretax				53,000,000
Charges and credits, Tax				9,000,000
Charges and credits, Net				44,000,000
Impairment And Other | Workforce reduction
Charges And Credits [Line Items]
Charges and credits, Pretax				646,000,000
Charges and credits, Tax				63,000,000
Charges and credits, Net				583,000,000
Impairment And Other | North America pressure pumping asset impairments
Charges And Credits [Line Items]
Charges and credits, Pretax				209,000,000
Charges and credits, Tax				67,000,000
Charges and credits, Net				142,000,000
Impairment And Other | Facilities impairments
Charges And Credits [Line Items]
Charges and credits, Pretax				165,000,000
Charges and credits, Tax				58,000,000
Charges and credits, Net				107,000,000
Impairment And Other | Other fixed asset impairments
Charges And Credits [Line Items]
Charges and credits, Pretax				684,000,000
Charges and credits, Tax				52,000,000
Charges and credits, Net				632,000,000
Impairment And Other | Inventory write-downs
Charges And Credits [Line Items]
Charges and credits, Pretax				616,000,000
Charges and credits, Tax				49,000,000
Charges and credits, Net				567,000,000
Impairment And Other | Multiclient seismic data impairment
Charges And Credits [Line Items]
Charges and credits, Pretax				198,000,000
Charges and credits, Tax				62,000,000
Charges and credits, Net				136,000,000
Impairment And Other | Other restructuring charges
Charges And Credits [Line Items]
Charges and credits, Pretax				55,000,000
Charges and credits, Net				$ 55,000,000