Segment Information - Schedule of summarized financial information for Revenue and Profit Before Tax (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information
Revenue	$ 3,394	$ 3,786	$ 3,968	$ 4,594	$ 6,635	$ 6,250	$ 5,935	$ 5,731	$ 15,742	$ 24,551	$ 22,364
Income before income taxes									(2,613)	2,627	1,715
Interest Expense [Member]
Segment Reporting Information
Revenue									0	0	0
Income before income taxes									(217)	(232)	(234)
Impairment and Restructuring Charges [Member]
Segment Reporting Information
Revenue									0	0	0
Income before income taxes									(1,993)	0	0
Settled Litigation [Member]
Segment Reporting Information
Revenue									0	0	0
Income before income taxes									13	(62)	0
Corporate and other
Segment Reporting Information
Revenue									0	0	0
Income before income taxes									(321)	(250)	(268)
North America
Segment Reporting Information
Revenue									6,009	12,078	10,878
Income before income taxes									(687)	1,466	968
Latin America
Segment Reporting Information
Revenue									1,799	2,236	2,307
Income before income taxes									134	290	66
Europe/Africa/Russia Caspian
Segment Reporting Information
Revenue									3,278	4,417	4,041
Income before income taxes									157	621	591
Middle East/Asia Pacific
Segment Reporting Information
Revenue									3,441	4,456	3,859
Income before income taxes									204	675	457
Industrial Services
Segment Reporting Information
Revenue									1,215	1,364	1,279
Income before income taxes									97	119	135
Total Operations
Segment Reporting Information
Revenue									15,742	24,551	22,364
Income before income taxes									$ (95)	$ 3,171	$ 2,217