Business Segment and Geographic Information (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Segment Reporting Information [Line Items]
Gain (Loss) on Extinguishment of Debt		$ 104
Early Repayment of Senior Debt		1,400
Venezuela trade receivables exchanged for promissory note		200
Revenue:
Revenue		4,279	$ 4,198
Operating income (loss):
Operating income (loss)		203	(3,079)
Impairments and other charges		0	(2,766)
Interest expense, net of interest income	[1]	(242)	(165)
Other, net		(18)	(47)
Income (loss) from continuing operations before income taxes		(57)	(3,291)
Completion and Production
Revenue:
Revenue		2,604	2,324
Operating income (loss):
Operating income (loss)		147	30
Drilling and Evaluation
Revenue:
Revenue		1,675	1,874
Operating income (loss):
Operating income (loss)		122	241
Total operations
Revenue:
Revenue		4,279	4,198
Operating income (loss):
Operating income (loss)		269	271
Corporate and other
Operating income (loss):
Operating income (loss)	[2]	$ (66)	$ (584)

[1] 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.

[2] Includes certain expenses not attributable to a particular business segment such as costs related to support functions and corporate executives, as well as merger-related costs incurred during the three months ended March 31, 2016.