Segment Information - Schedule of summarized financial information for Assets (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information
Assets	$ 24,080	$ 28,827	$ 27,934
North America
Segment Reporting Information
Assets	6,599	9,782	9,672
Latin America
Segment Reporting Information
Assets	2,323	2,508	2,709
Europe/Africa/Russia Caspian
Segment Reporting Information
Assets	3,077	4,106	4,098
Middle East/Asia Pacific
Segment Reporting Information
Assets	3,441	4,029	3,705
Industrial Services
Segment Reporting Information
Assets	1,106	1,260	980
Shared assets
Segment Reporting Information
Assets	5,613	5,423	5,110
Total Operations
Segment Reporting Information
Assets	22,159	27,108	26,274
Corporate and other
Segment Reporting Information
Assets	$ 1,921	$ 1,719	$ 1,660