Segment Information - (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Segment Reporting Information [Line Items]
Assets	$ 19,491		$ 19,491		$ 24,080
Summarized financial information [Abstract]
Revenue	2,353	$ 3,786	7,431	$ 12,348
Operating Profit (Loss) Before Tax	(360)	(156)	(1,734)	(1,181)
Corporate
Segment Reporting Information [Line Items]
Assets	3,008		3,008		1,921
Summarized financial information [Abstract]
Revenue	0	0	0	0
Operating Profit (Loss) Before Tax	(78)	(26)	(139)	(104)
Loss on early extinguishment of debt
Summarized financial information [Abstract]
Revenue			0	0
Operating Profit (Loss) Before Tax			(142)	0
Interest expense, net
Summarized financial information [Abstract]
Revenue	0	0	0	0
Operating Profit (Loss) Before Tax	(39)	(55)	(142)	(162)
Impairment and restructuring charges
Summarized financial information [Abstract]
Revenue	0	0	0	0
Operating Profit (Loss) Before Tax	(304)	(98)	(1,590)	(747)
Goodwill impairment
Summarized financial information [Abstract]
Revenue	0	0	0	0
Operating Profit (Loss) Before Tax	(17)	0	(1,858)	0
Merger and related costs
Summarized financial information [Abstract]
Revenue	0	0	0	0
Operating Profit (Loss) Before Tax	0	(93)	(180)	(204)
Merger termination fee
Summarized financial information [Abstract]
Revenue			0	0
Operating Profit (Loss) Before Tax			3,500	0
North America
Segment Reporting Information [Line Items]
Assets	3,541		3,541		6,599
Summarized financial information [Abstract]
Revenue	674	1,368	2,161	4,872
Operating Profit (Loss) Before Tax	(65)	(153)	(601)	(512)
Latin America
Segment Reporting Information [Line Items]
Assets	1,595		1,595		2,323
Summarized financial information [Abstract]
Revenue	243	439	755	1,371
Operating Profit (Loss) Before Tax	20	51	(289)	129
Middle East/Asia Pacific
Segment Reporting Information [Line Items]
Assets	2,867		2,867		3,441
Summarized financial information [Abstract]
Revenue	649	849	2,018	2,621
Operating Profit (Loss) Before Tax	71	76	(22)	198
Industrial Services
Segment Reporting Information [Line Items]
Assets	678		678		1,106
Summarized financial information [Abstract]
Revenue	268	339	786	929
Operating Profit (Loss) Before Tax	30	44	(17)	86
Total Operations
Summarized financial information [Abstract]
Revenue	2,353	3,786	7,431	12,348
Operating Profit (Loss) Before Tax	78	116	(1,183)	36
Europe/Africa/Russia Caspian
Segment Reporting Information [Line Items]
Assets	2,488		2,488		3,077
Summarized financial information [Abstract]
Revenue	519	791	1,711	2,555
Operating Profit (Loss) Before Tax	22	$ 98	(254)	$ 135
Shared assets
Segment Reporting Information [Line Items]
Assets	5,314		5,314		5,613
Continuing Operations
Segment Reporting Information [Line Items]
Assets	$ 16,483		$ 16,483		$ 22,159