Business Segment and Geographic Information (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenue:
Revenue		$ 22,408	$ 23,995	$ 20,620
Operating income:
Total operating income (loss)		(448)	2,467	1,374
Impairments and other charges		2,506	265	647
Impairments and other charges	[1]	(2,506)	(265)	(647)
Interest expense, net of interest income		(569)	(554)	(593)
Other, net		(105)	(99)	(99)
Income (loss) from continuing operations before income taxes		(1,122)	1,814	682
Capital expenditures:
Total capital expenditures		1,530	2,026	1,373
Depreciation, depletion and amortization:
Total depreciation, depletion and amortization		1,625	1,606	1,556
Total assets:
Total assets		25,377	25,982
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment, Net		7,310	8,873
Completion and Production
Revenue:
Revenue		14,031	15,973	13,077
Operating income:
Total operating income (loss)		1,671	2,278	1,625
Impairments and other charges		1,600
Capital expenditures:
Total capital expenditures		800	1,364	1,111
Depreciation, depletion and amortization:
Total depreciation, depletion and amortization		1,049	1,058	953
Total assets:
Total assets	[2]	11,894	13,231
Drilling and Evaluation
Revenue:
Revenue		8,377	8,022	7,543
Operating income:
Total operating income (loss)		642	745	726
Impairments and other charges		849
Capital expenditures:
Total capital expenditures		728	657	261
Depreciation, depletion and amortization:
Total depreciation, depletion and amortization		552	512	563
Total assets:
Total assets	[2]	8,059	8,037
Corporate and shared assets
Total assets:
Total assets	[3]	5,424	4,714
Total operations
Operating income:
Total operating income (loss)		2,313	3,023	2,351
Corporate and other
Operating income:
Total operating income (loss)	[4]	(255)	(291)	(330)
Impairments and other charges		56
Capital expenditures:
Total capital expenditures		2	5	1
Depreciation, depletion and amortization:
Total depreciation, depletion and amortization		24	36	40
VENEZUELA
Operating income:
Impairments and other charges	[1]		(265)	(647)
North America [Member]
Revenue:
Revenue		11,884	14,431	11,564
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment, Net		4,666	5,621
Latin America [Member]
Revenue:
Revenue		2,364	2,065	2,116
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment, Net		754	937
Europe/Africa/CIS [Member]
Revenue:
Revenue		3,285	2,945	2,781
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment, Net		772	936
Middle East/Asia [Member]
Revenue:
Revenue		4,875	4,554	$ 4,159
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment, Net		$ 1,118	$ 1,379

[1] Impairments and other charges are as follows: -For the year ended December 31, 2019, amount includes approximately $1.6 billion attributable to Completion and Production, $849 million attributable to Drilling and Evaluation, and $56 million attributable to Corporate and other. -For the years ended December 31, 2018 and December 31, 2017, we recorded aggregate charges of $265 million and $647 million, respectively, to write-down our investment in Venezuela.

[2] Assets associated with specific segments primarily include receivables, inventories, property, plant and equipment, operating lease right-of-use assets, equity in and advances to related companies and goodwill.

[3] Corporate and other primarily include cash and equivalents and deferred tax assets.

[4] Includes certain expenses not attributable to a particular business segment, such as costs related to support functions and corporate executives, operating lease assets, and also includes amortization expense associated with intangible assets recorded as a result of acquisitions.