Charges and Credits - Summary of Charges (Detail) - Impairment And Other - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Investment In Joint Venture [Line Items]
Charges and credits, Pretax	$ 2,908	$ 439
Charges and credits, Tax	432	56
Charges and credits, Net	2,476	383
Amortization of inventory fair value adjustment
Investment In Joint Venture [Line Items]
Charges and credits, Pretax	150
Charges and credits, Tax	45
Charges and credits, Net	105
Workforce reduction
Investment In Joint Venture [Line Items]
Charges and credits, Pretax	646	390
Charges and credits, Tax	63	56
Charges and credits, Net	583	334
North America pressure pumping asset impairments
Investment In Joint Venture [Line Items]
Charges and credits, Pretax	209
Charges and credits, Tax	67
Charges and credits, Net	142
Facilities impairments
Investment In Joint Venture [Line Items]
Charges and credits, Pretax	165
Charges and credits, Tax	58
Charges and credits, Net	107
Other fixed asset impairments
Investment In Joint Venture [Line Items]
Charges and credits, Pretax	684
Charges and credits, Tax	52
Charges and credits, Net	632
Inventory Write Down
Investment In Joint Venture [Line Items]
Charges and credits, Pretax	616
Charges and credits, Tax	49
Charges and credits, Net	567
Multiclient seismic data impairment
Investment In Joint Venture [Line Items]
Charges and credits, Pretax	198
Charges and credits, Tax	62
Charges and credits, Net	136
Other restructuring charges
Investment In Joint Venture [Line Items]
Charges and credits, Pretax	55
Charges and credits, Net	55
Merger-related employee benefits
Investment In Joint Venture [Line Items]
Charges and credits, Pretax	47
Charges and credits, Tax	7
Charges and credits, Net	40
Professional fees
Investment In Joint Venture [Line Items]
Charges and credits, Pretax	45
Charges and credits, Tax	10
Charges and credits, Net	35
Facility closure costs
Investment In Joint Venture [Line Items]
Charges and credits, Pretax	40
Charges and credits, Tax	10
Charges and credits, Net	30
Other merger and integration-related
Investment In Joint Venture [Line Items]
Charges and credits, Pretax	53
Charges and credits, Tax	9
Charges and credits, Net	$ 44
Currency Devaluation Loss In Venezuela
Investment In Joint Venture [Line Items]
Charges and credits, Pretax		49
Charges and credits, Net		$ 49