Business Segment and Geographic Information (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenue:
Revenue		$ 15,295	$ 14,445	$ 22,408
Operating income:
Total operating income (loss)		1,800	(2,436)	(448)
Impairments and other charges	[1]	(12)	(3,799)	(2,506)
Interest expense, net of interest income		(469)	(505)	(569)
Other, net		(79)	(111)	(105)
Income (loss) before income taxes		1,252	(3,220)	(1,122)
Capital expenditures:
Total capital expenditures		799	728	1,530
Depreciation, depletion, and amortization:
Total depreciation, depletion and amortization		904	1,058	1,625
Total assets:
Total assets		22,321	20,680
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment, Net		4,326	4,325
Gain (Loss) on Extinguishment of Debt		0	(168)	0
Total operations
Operating income:
Total operating income (loss)		2,039	1,564	2,313
Corporate and shared assets
Total assets:
Total assets	[2]	7,529	6,385
Corporate and other
Operating income:
Total operating income (loss)	[3]	(227)	(201)	(255)
Capital expenditures:
Total capital expenditures		5	4	2
Depreciation, depletion, and amortization:
Total depreciation, depletion and amortization		14	13	24
Completion and Production
Revenue:
Revenue		8,410	7,839	14,031
Operating income:
Total operating income (loss)		1,238	995	1,671
Impairments and other charges		(42)	(2,400)	(1,600)
Capital expenditures:
Total capital expenditures		402	314	800
Depreciation, depletion, and amortization:
Total depreciation, depletion and amortization		502	615	1,049
Total assets:
Total assets	[4]	8,186	7,924
Drilling and Evaluation
Revenue:
Revenue		6,885	6,606	8,377
Operating income:
Total operating income (loss)		801	569	642
Impairments and other charges		(9)	(1,400)	(849)
Capital expenditures:
Total capital expenditures		392	410	728
Depreciation, depletion, and amortization:
Total depreciation, depletion and amortization		388	430	552
Total assets:
Total assets	[4]	6,606	6,371
Corporate and Other [Member]
Operating income:
Impairments and other charges		39	(62)	(56)
North America [Member]
Revenue:
Revenue		6,371	5,731	11,884
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment, Net		2,238	2,211
Latin America [Member]
Revenue:
Revenue		2,362	1,668	2,364
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment, Net		510	544
Europe/Africa/CIS [Member]
Revenue:
Revenue		2,719	2,813	3,285
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment, Net		584	602
Middle East/Asia [Member]
Revenue:
Revenue		3,843	4,233	$ 4,875
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment, Net		$ 994	$ 968

[1] Impairments and other charges are as follows: -For the year ended December 31, 2021, amount includes approximately $42 million attributable to Completion and Production, $9 million attributable to Drilling and Evaluation, and a $39 million net gain attributable to Corporate and other. -For the year ended December 31, 2020, amount includes approximately $2.4 billion attributable to Completion and Production, $1.4 billion attributable to Drilling and Evaluation, and $62 million attributable to Corporate and other. -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.

[2] Includes primarily cash and equivalents and deferred tax assets.

[3] Includes certain expenses not attributable to a 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.

[4] 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.