Charges and Credits - Summary of Charges (Detail) - USD ($)	3 Months Ended				9 Months Ended
	Mar. 31, 2016	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Sep. 30, 2016
Investment In Joint Venture [Line Items]
Charges and credits, Pretax	$ 0	$ 0	$ 0
Impairment And Other
Investment In Joint Venture [Line Items]
Charges and credits, Pretax				$ 439,000,000	$ 3,144,000,000
Charges and credits, Tax				56,000,000	492,000,000
Charges and credits, Net				383,000,000	2,652,000,000
Impairment And Other | Amortization of inventory fair value adjustment
Investment In Joint Venture [Line Items]
Charges and credits, Pretax					299,000,000
Charges and credits, Tax					90,000,000
Charges and credits, Net					209,000,000
Impairment And Other | Workforce reduction
Investment In Joint Venture [Line Items]
Charges and credits, Pretax				390,000,000	646,000,000
Charges and credits, Tax				56,000,000	63,000,000
Charges and credits, Net				334,000,000	583,000,000
Impairment And Other | North America pressure pumping asset impairments
Investment In Joint Venture [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
Investment In Joint Venture [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
Investment In Joint Venture [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 Down
Investment In Joint Venture [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
Investment In Joint Venture [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
Investment In Joint Venture [Line Items]
Charges and credits, Pretax					55,000,000
Charges and credits, Net					55,000,000
Impairment And Other | Merger-related employee benefits
Investment In Joint Venture [Line Items]
Charges and credits, Pretax					93,000,000
Charges and credits, Tax					17,000,000
Charges and credits, Net					76,000,000
Impairment And Other | Professional fees
Investment In Joint Venture [Line Items]
Charges and credits, Pretax					45,000,000
Charges and credits, Tax					10,000,000
Charges and credits, Net					35,000,000
Impairment And Other | Facility closure costs
Investment In Joint Venture [Line Items]
Charges and credits, Pretax					51,000,000
Charges and credits, Tax					13,000,000
Charges and credits, Net					38,000,000
Impairment And Other | Other merger and integration-related
Investment In Joint Venture [Line Items]
Charges and credits, Pretax					83,000,000
Charges and credits, Tax					11,000,000
Charges and credits, Net					$ 72,000,000
Impairment And Other | Currency Devaluation Loss In Venezuela
Investment In Joint Venture [Line Items]
Charges and credits, Pretax				49,000,000
Charges and credits, Net				$ 49,000,000