Segment Information - Schedule of Segment Reporting Information, by Segment (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Revenue		$ 35,475	$ 48,580	$ 45,266
Income before Taxes		2,881	7,639	8,691
Assets		68,005	66,904	67,100
Depreciation and amortization	[1]	4,078	4,094	3,879
Capital Expenditures		2,410	3,976	3,943
Pretax operating income		6,510	10,576	9,344
Interest		346	369	391
Restructuring and other charges		2,575	1,773	420
Operating Segments
Segment Reporting Information [Line Items]
Revenue		35,475	48,580	45,266
Interest income		22	20	11
Interest		30	22	22
Operating Segments | Reservoir Characterization
Segment Reporting Information [Line Items]
Revenue		9,501	12,905	13,050
Income before Taxes		2,450	3,708	3,711
Assets		8,266	9,191	9,316
Depreciation and amortization		1,279	1,459	1,402
Capital Expenditures		649	1,207	1,361
Operating Segments | Drilling
Segment Reporting Information [Line Items]
Revenue		13,563	18,128	16,792
Income before Taxes		2,538	3,805	3,238
Assets		8,535	11,155	10,440
Depreciation and amortization		1,177	1,173	1,076
Capital Expenditures		672	1,328	1,289
Operating Segments | Production
Segment Reporting Information [Line Items]
Revenue		12,548	17,763	15,646
Income before Taxes		1,585	3,193	2,624
Assets		9,937	11,481	10,929
Depreciation and amortization		1,216	1,066	1,001
Capital Expenditures		825	1,192	1,126
Eliminations & other
Segment Reporting Information [Line Items]
Revenue		(137)	(216)	(222)
Income before Taxes		(63)	(130)	(229)
Assets		2,067	1,572	2,332
Depreciation and amortization		213	198	192
Capital Expenditures		264	249	167
Material Reconciling Items
Segment Reporting Information [Line Items]
Depreciation and amortization	[2]	193	198	208
Goodwill and intangible assets		20,174	20,141	19,415
All other assets		2,262	2,186	2,618
Corporate & other	[2]	(768)	(848)	(726)
Corporate & other	[2]	11,178	11,178	12,050
Interest income	[3]	30	31	22
Interest	[4]	(316)	(347)	(369)
Restructuring and other charges	[5]	$ (2,575)	$ (1,773)	$ 420

[1] Includes depreciation of property, plant and equipment and amortization of intangible assets, multiclient seismic data costs and SPM investments.

[2] Comprised principally of certain corporate expenses not allocated to the segments, stock-based compensation costs, amortization expense associated with certain intangible assets, certain centrally managed initiatives and other nonoperating items. Corporate assets consist of cash, short-term investments, fixed income investments, held to maturity and investments in affiliates.

[3] Interest income excludes amounts which are included in the segments’ income (2015: $22 million; 2014: $20 million; 2013: $11 million).

[4] Interest expense excludes amounts which are included in the segments’ income (2015: $30 million; 2014: $22 million; 2013: $22 million).

[5] See Note 3 – Charges and Credits.