Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Millions		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenue:
Revenue		$ 15,295	$ 14,445	$ 22,408
Operating costs and expenses:
Impairments and other charges	[1]	12	3,799	2,506
General and administrative		204	182	227
Total operating costs and expenses		13,495	16,881	22,856
Total operating income (loss)		1,800	(2,436)	(448)
Interest expense, net of interest income		(469)	(505)	(569)
Investment Income, Interest		60	38	23
Gain (Loss) on Extinguishment of Debt		0	(168)	0
Other, net		(79)	(111)	(105)
Income (loss) before income taxes		1,252	(3,220)	(1,122)
Income tax benefit (provision)		216	278	(7)
Net income (loss)		1,468	(2,942)	(1,129)
Net (income) loss attributable to noncontrolling interest		(11)	(3)	(2)
Net income (loss) attributable to company		1,457	(2,945)	(1,131)
Amounts attributable to company shareholders:
Net income (loss) attributable to company		$ 1,457	$ (2,945)	$ (1,131)
Basic and diluted income (loss) per share attributable to company shareholders:
Net income (loss) per share (in dollars per share)		$ 1.63	$ (3.34)	$ (1.29)
Weighted Average Number of Shares Outstanding, Basic and Diluted		892,000	881,000	875,000
Services [Member]
Revenue:
Revenue		$ 10,989	$ 10,203	$ 16,884
Operating costs and expenses:
Cost of services and sales		9,745	9,458	15,684
Product sales [Member]
Revenue:
Revenue		4,306	4,242	5,524
Operating costs and expenses:
Cost of services and sales		$ 3,534	$ 3,442	$ 4,439

[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.