Segment Information - Schedule of Segment Reporting Information, by Segment (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Revenue		$ 32,917	$ 32,815	$ 30,440
Income Before Taxes		(10,418)	2,624	(1,183)
Assets		56,312	70,507	71,987
Depreciation and Amortization	[1]	3,589	3,556	3,837
Capital Expenditures		1,724	2,160	2,107
Pretax operating income		3,978	4,187	3,921
Interest expense		609	575	566
Charges & credits		12,901	141	3,764
Reservoir Characterization
Segment Reporting Information [Line Items]
Revenue		6,312	6,173
Drilling
Segment Reporting Information [Line Items]
Revenue		9,721	9,250
Production
Segment Reporting Information [Line Items]
Revenue		11,987	12,394
Cameron
Segment Reporting Information [Line Items]
Revenue		5,336	5,520
Operating Segments
Segment Reporting Information [Line Items]
Revenue		32,917	32,815	30,440
Interest income		8	8	21
Interest expense		38	38	53
Operating Segments | Reservoir Characterization
Segment Reporting Information [Line Items]
Revenue		6,312	6,173	6,476
Income Before Taxes		1,327	1,347	1,184
Assets		3,909	4,306	4,714
Depreciation and Amortization		643	667	981
Capital Expenditures		307	296	304
Operating Segments | Drilling
Segment Reporting Information [Line Items]
Revenue		9,721	9,250	8,392
Income Before Taxes		1,216	1,239	1,151
Assets		5,724	5,843	5,513
Depreciation and Amortization		540	597	697
Capital Expenditures		616	718	629
Operating Segments | Production
Segment Reporting Information [Line Items]
Revenue		11,987	12,394	10,630
Income Before Taxes		993	1,052	936
Assets		10,289	12,625	12,450
Depreciation and Amortization		1,540	1,417	1,240
Capital Expenditures		551	886	889
Operating Segments | Cameron
Segment Reporting Information [Line Items]
Revenue		5,336	5,520	5,524
Income Before Taxes		613	653	792
Assets		4,102	4,138	4,156
Depreciation and Amortization		233	247	268
Capital Expenditures		166	152	151
Eliminations & other
Segment Reporting Information [Line Items]
Revenue		(439)	(522)	(582)
Income Before Taxes		(171)	(104)	(142)
Assets		1,414	1,460	1,665
Depreciation and Amortization		216	189	213
Capital Expenditures		84	108	134
Goodwill and intangible assets		23,130	33,658	34,472
Cash and short term investments		2,167	2,777
Cash, short term investments and fixed income investments				5,089
All other assets		5,577	5,700	3,928
Corporate & other	[2]	(957)	(937)	(934)
Interest income	[3]	33	52	107
Interest expense	[4]	(571)	(537)	(513)
Charges & credits	[5]	(12,901)	(141)	(3,764)
Eliminations & other | Corporate and Other
Segment Reporting Information [Line Items]
Depreciation and Amortization	[2]	$ 417	$ 439	$ 438

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

[2] Comprised principally of certain corporate expenses not allocated to the segments, stock-based compensation costs, amortization expense associated with certain intangible assets (including intangible asset amortization expense resulting from the 2016 acquisition of Cameron), certain centrally managed initiatives and other nonoperating items.

[3] Interest income excludes amounts which are included in the segments’ income (2019: $8 million; 2018: $8 million; 2017: $21 million).

[4] Interest expense excludes amounts which are included in the segments’ income (2019: $38 million; 2018: $38 million; 2017: $53 million).

[5] See Note 3 – Charges and Credits.