Business Segment and Geographic Information (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenue:
Revenue		$ 5,930	$ 6,147	$ 11,667	$ 11,887
Operating income (loss):
Impairments and other charges	[1]	247	0	308	265
Operating income		303	789	668	1,143
Interest expense, net of interest income		(144)	(137)	(287)	(277)
Other, net		(8)	(19)	(38)	(44)
Income (loss) from continuing operations before income taxes		151	633	343	822
Completion and Production
Revenue:
Revenue		3,805	4,164	7,467	7,971
Operating income (loss):
Impairments and other charges	[1]	77		127
Operating income		470	669	838	1,169
Drilling and Evaluation
Revenue:
Revenue		2,125	1,983	4,200	3,916
Operating income (loss):
Impairments and other charges	[1]	142		153
Operating income		145	191	268	379
Total operations
Revenue:
Revenue		5,930	6,147	11,667	11,887
Operating income (loss):
Operating income		615	860	1,106	1,548
Corporate and other
Operating income (loss):
Operating income	[2]	(65)	$ (71)	(130)	$ (140)
Corporate and other
Operating income (loss):
Impairments and other charges	[1]	$ 28		$ 28

[1] For the three months ended June 30, 2019, amount includes $77 million attributable to Completion and Production, $142 million attributable to Drilling and Evaluation, and $28 million attributable to Corporate and other. For the six months ended June 30, 2019, amount includes $127 million attributable to Completion and Production, $153 million attributable to Drilling and Evaluation, and $28 million attributable to Corporate and other. During the six months ended June 30, 2018, we recognized a pre-tax charge of $265 million related to a write-down of all of our remaining investment in Venezuela. See Note 2 for further discussion on these impairments and other charges. There were no such impairments and other charges recorded during the three months ended June 30, 2018.

[2] Corporate and other includes certain expenses not attributable to a particular business segment, such as costs related to support functions and corporate executives.