Charges and Credits - Summary of Charges and Credits (Detail) - USD ($) $ in Millions		3 Months Ended		12 Months Ended
	Apr. 02, 2016	Dec. 31, 2017	Jun. 30, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Charges And Credits [Line Items]
Charges and credits, Pretax		$ 1,025	$ 50	$ 3,764	$ 3,820
Charges and credits, Tax				140	583
Charges and credits, Noncontolling interests				34
Charges and credits, Net				3,590	3,237
Other restructuring charges
Charges And Credits [Line Items]
Charges and credits, Pretax		102
Workforce reduction
Charges And Credits [Line Items]
Charges and credits, Pretax		247
Provision for loss on long-term construction project
Charges And Credits [Line Items]
Charges and credits, Pretax		245
Inventory write-downs
Charges And Credits [Line Items]
Charges and credits, Pretax		$ 59
Impairment And Other
Charges And Credits [Line Items]
Charges and credits, Pretax						$ 2,575
Charges and credits, Tax						357
Charges and credits, Net						2,218
Impairment And Other | WesternGeco seismic restructuring charges
Charges And Credits [Line Items]
Charges and credits, Pretax				1,114
Charges and credits, Tax				20
Charges and credits, Net				1,094
Impairment And Other | Venezuela investment write-down
Charges And Credits [Line Items]
Charges and credits, Pretax				938
Charges and credits, Net				938
Impairment And Other | Multiclient seismic data impairment
Charges And Credits [Line Items]
Charges and credits, Pretax				246	198
Charges and credits, Tax				81	62
Charges and credits, Net				165	136
Impairment And Other | Other restructuring charges
Charges And Credits [Line Items]
Charges and credits, Pretax				156	55	84
Charges and credits, Tax				10		7
Charges and credits, Noncontolling interests				22
Charges and credits, Net				124	55	77
Impairment And Other | Workforce reduction
Charges And Credits [Line Items]
Charges and credits, Pretax				247	880	920
Charges and credits, Tax				13	69	107
Charges and credits, Net				234	811	813
Impairment And Other | Other fixed asset impairments
Charges And Credits [Line Items]
Charges and credits, Pretax					684
Charges and credits, Tax					52
Charges and credits, Net					632
Impairment And Other | Inventory write-downs
Charges And Credits [Line Items]
Charges and credits, Pretax					616	269
Charges and credits, Tax					49	27
Charges and credits, Net					567	242
Impairment And Other | North America pressure pumping asset impairments
Charges And Credits [Line Items]
Charges and credits, Pretax					209
Charges and credits, Tax					67
Charges and credits, Net					142
Impairment And Other | Facilities impairments
Charges And Credits [Line Items]
Charges and credits, Pretax					165
Charges and credits, Tax					58
Charges and credits, Net					107
Impairment And Other | Facility closure costs
Charges And Credits [Line Items]
Charges and credits, Pretax					165
Charges and credits, Tax					40
Charges and credits, Net					125
Impairment And Other | Costs associated with exiting certain activities
Charges And Credits [Line Items]
Charges and credits, Pretax					98
Charges and credits, Tax					23
Charges and credits, Net					75
Impairment And Other | Currency Devaluation Loss In Egypt
Charges And Credits [Line Items]
Charges and credits, Pretax					63
Charges and credits, Net					63
Impairment And Other | Contract termination costs
Charges And Credits [Line Items]
Charges and credits, Pretax					39	41
Charges and credits, Tax					9	2
Charges and credits, Net					30	39
Impairment And Other | Fixed asset impairments
Charges And Credits [Line Items]
Charges and credits, Pretax						776
Charges and credits, Tax						141
Charges and credits, Net						635
Impairment And Other | Impairment of SPM Project
Charges And Credits [Line Items]
Charges and credits, Pretax						182
Charges and credits, Tax						36
Charges and credits, Net						146
Impairment And Other | Facility closures
Charges And Credits [Line Items]
Charges and credits, Pretax						177
Charges and credits, Tax						37
Charges and credits, Net						140
Impairment And Other | Geopolitical Events
Charges And Credits [Line Items]
Charges and credits, Pretax						77
Charges and credits, Net						77
Impairment And Other | Currency Devaluation Loss In Venezuela
Charges And Credits [Line Items]
Charges and credits, Pretax						49
Charges and credits, Net						$ 49
Promissory Note Fair Value Adjustment and Other
Charges And Credits [Line Items]
Charges and credits, Pretax			$ 460	510
Charges and credits, Noncontolling interests				12
Charges and credits, Net				498
Cost of Sales
Charges And Credits [Line Items]
Charges and credits, Pretax				245	299
Cost of Sales | Provision for loss on long-term construction project
Charges And Credits [Line Items]
Charges and credits, Pretax				245
Charges and credits, Tax				22
Charges and credits, Net				223
Cost of Sales | Amortization of inventory fair value adjustment
Charges And Credits [Line Items]
Charges and credits, Pretax					299
Charges and credits, Tax					90
Charges and credits, Net					209
Merger and Integration
Charges And Credits [Line Items]
Charges and credits, Pretax	$ 349			308	349
Merger and Integration | Merger and integration-related costs
Charges And Credits [Line Items]
Charges and credits, Pretax				308
Charges and credits, Tax				70
Charges and credits, Net				238
Merger and Integration | Facility closure costs
Charges And Credits [Line Items]
Charges and credits, Pretax					61
Charges and credits, Tax					13
Charges and credits, Net					48
Merger and Integration | Other merger and integration-related
Charges And Credits [Line Items]
Charges and credits, Pretax					160
Charges and credits, Tax					28
Charges and credits, Net					132
Merger and Integration | Merger-related employee benefits
Charges And Credits [Line Items]
Charges and credits, Pretax					83
Charges and credits, Tax					13
Charges and credits, Net					70
Merger and Integration | Professional fees
Charges And Credits [Line Items]
Charges and credits, Pretax					45
Charges and credits, Tax					10
Charges and credits, Net					$ 35
US tax reform charge
Charges And Credits [Line Items]
Charges and credits, Tax				(76)
Charges and credits, Net				$ 76