Business Segment and Geographic Information (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Revenue:
Revenue		$ 5,582	$ 8,701	$ 18,551	$ 24,100
Operating income (loss):
Operating income (loss)		43	1,634	(251)	3,798
Restructuring Charges	[1]	(381)	0	(1,895)	0
Interest expense, net of interest income		(99)	(96)	(311)	(283)
Other, net		(34)	12	(281)	(43)
Income (loss) from continuing operations before income taxes		(90)	1,550	(843)	3,472
Completion and Production
Revenue:
Revenue		3,200	5,420	10,890	14,782
Operating income (loss):
Operating income (loss)		163	1,071	938	2,619
Restructuring Charges		(228)		(949)
Drilling and Evaluation
Revenue:
Revenue		2,382	3,281	7,661	9,318
Operating income (loss):
Operating income (loss)		401	451	1,107	1,263
Restructuring Charges		(138)		(865)
Total operations
Revenue:
Revenue		5,582	8,701	18,551	24,100
Operating income (loss):
Operating income (loss)		564	1,522	2,045	3,882
Corporate and other
Operating income (loss):
Operating income (loss)	[2]	(140)	$ 112	(401)	$ (84)
Restructuring Charges		$ (15)		$ (81)

[1] (b) Includes $228 million attributable to Completion and Production, $138 million attributable to Drilling and Evaluation, and $15 million attributable to Corporate and other for the three months ended September 30, 2015. Includes $949 million attributable to Completion and Production, $865 million attributable to Drilling and Evaluation, and $81 million attributable to Corporate and other for the nine months ended September 30, 2015.

[2] (a) Includes certain expenses not attributable to a particular business segment such as costs related to support functions and corporate executives, as well as costs related to the pending Baker Hughes acquisition incurred during the three and nine months ended September 30, 2015.