Business Combinations (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended
	Apr. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014	Jul. 31, 2014
Business Acquisition [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired				$ 14	$ (17)
Goodwill, Acquired During Period				2
Gain on Sale of Businesses		$ 0	$ 38	(2)	38
Long-Lived Assets Impairment and Other Related Charges		17	0	208	143
Goodwill and Equity Investment Impairment		0	(4)	20	121
Joint Venture in China
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired	30.00%
Payments to Acquire Businesses, Net of Cash Acquired	$ 13
Equity Method Investment, Ownership Percentage	45.00%
Noncontrolling Interest, Ownership Percentage by Parent	75.00%
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain	$ 16
Goodwill, Acquired During Period	6
Cash Acquired from Acquisition	$ 30
Company that Designs and Produces Well Completion Tools
Business Acquisition [Line Items]
Contingent consideration arrangement		$ 15		$ 15		$ 3
Pipeline and Specialty Services Business
Business Acquisition [Line Items]
Disposal Group, Including Discontinued Operation, Consideration			246		246
Disposal Group, Including Discontinued Operation, Expenses to Dispose Group			245		$ 245
Disposal Group, Held-for-sale, Not Discontinued Operations
Business Acquisition [Line Items]
Gain on Sale of Businesses						$ 49
Land Drilling and Workover Rig Operations
Business Acquisition [Line Items]
Disposal Group, Including Discontinued Operation, Consideration							$ 499
Disposal Group, Including Discontinued Operation, Expenses to Dispose Group							$ 486
Long-Lived Assets Impairment and Other Related Charges			143
Goodwill and Equity Investment Impairment			121
Goodwill Impairment (classified as Assets Held For Sale)			$ 95