Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Millions, $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenue:
Revenue		$ 3,860	$ 2,975	$ 11,018	$ 11,208
Operating costs and expenses:
Impairments and other charges	[1]	12	133	12	3,353
General and administrative		46	41	145	138
Total operating costs and expenses		3,414	2,833	9,768	13,548
Operating income		446	142	1,250	(2,340)
Interest expense, net of interest income		(116)	(122)	(361)	(380)
Loss on early extinguishment of debt		0	0	0	(168)	[2]
Other, net		(14)	(21)	(55)	(92)
Income (loss) from continuing operations before income taxes		316	(1)	834	(2,980)
Income tax (provision) benefit		(76)	(18)	(193)	265
Net income (loss)		240	(19)	641	(2,715)
Net (income) loss attributable to noncontrolling interest		(4)	2	(8)	5
Net income (loss) attributable to company		$ 236	$ (17)	$ 633	$ (2,710)
Basic and diluted net income per share		$ 260,000	$ (20,000.00)	$ 710,000	$ (3,080,000.00)
Weighted Average Number of Shares Outstanding, Basic		894	882	891	879
Weighted Average Number of Shares Outstanding, Diluted		894	882	891	879
Interest income		$ 15	$ 11	$ 39	$ 28
Noncontrolling Interest in Consolidated Subsidiaries
Operating costs and expenses:
Net income (loss)		4	(2)
Services [Member]
Revenue:
Revenue		2,802	2,068	7,948	7,940
Operating costs and expenses:
Cost of services and sales		2,467	1,904	7,088	7,394
Product sales [Member]
Revenue:
Revenue		1,058	907	3,070	3,268
Operating costs and expenses:
Cost of services and sales		$ 889	$ 755	$ 2,523	$ 2,663

[1] For the three and nine months ended September 30, 2021, amount includes a $42 million charge attributable to Completions and Production, a $9 million charge attributable to Drilling and Evaluation, and a $39 million net gain attributable to Corporate and other. For the three and nine months ended September 30, 2020, amount includes $90 million and $2.1 billion attributable to Completion and Production, $40 million and $1.2 billion attributable to Drilling and Evaluation, and $3 million and $44 million attributable to Corporate and other, respectively.

[2] For the nine months ended September 30, 2020, amount includes a $168 million loss on extinguishment of debt related to the early repurchase of senior notes.