Business Segment and Geographic Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Revenue:
Revenue	$ 8,051	$ 7,317	$ 15,399	$ 14,291
Operating income (loss):
Operating income	1,194	984	2,164	886
Interest expense, net of interest income	(94)	(71)	(187)	(142)
Other, net	(24)	(11)	(55)	(25)
Income from continuing operations before income taxes	1,076	902	1,922	719
Completion and Production
Revenue:
Revenue	4,942	4,363	9,362	8,463
Operating income (loss):
Operating income	887	732	1,548	1,347
Drilling and Evaluation
Revenue:
Revenue	3,109	2,954	6,037	5,828
Operating income (loss):
Operating income	414	415	812	822
Total operations
Revenue:
Revenue	8,051	7,317	15,399	14,291
Operating income (loss):
Operating income	1,301	1,147	2,360	2,169
Corporate and other
Operating income (loss):
Operating income	$ (107)	$ (163)	$ (196)	$ (1,283)