Business Segment and Geographic Information (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2018		Mar. 31, 2017
Revenue:
Revenue		$ 5,740		$ 4,279
Operating income (loss):
Impairments and other charges		(265)	[1]	0
Operating income		354		203
Interest expense, net of interest income		(140)		(242)	[2]
Other, net		(25)		(18)
Income (loss) from continuing operations before income taxes		189		(57)
Completion and Production
Revenue:
Revenue		3,807		2,604
Operating income (loss):
Operating income		500		147
Drilling and Evaluation
Revenue:
Revenue		1,933		1,675
Operating income (loss):
Operating income		188		122
Total operations
Revenue:
Revenue		5,740		4,279
Operating income (loss):
Operating income		688		269
Corporate and other
Operating income (loss):
Operating income	[3]	$ (69)		$ (66)

[1] Represents a pre-tax charge of $265 million related to a write-down of all of our remaining investment in Venezuela, consisting of receivables, fixed assets, inventory and other assets and liabilities in the three months ended March 31, 2018.

[2] Includes $104 million of costs related to the early extinguishment of $1.4 billion of senior notes in the three months ended March 31, 2017.

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