Divestitures Narrative (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended			12 Months Ended
	Jul. 31, 2014	Dec. 31, 2014	Sep. 30, 2014	Dec. 31, 2013	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Oct. 07, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss (Gain) on Sale of Businesses and Investments, Net					$ 0	$ 6	$ (349)
Long-Lived Asset Impairments, Write-Downs and Other Charges					$ 1,043	$ 768	495
Engineered Chemistry and Integrity Dilling Fluids Business [Domain]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Including Discontinued Operation, Operating Income (Loss)							57
Disposal Group, Including Discontinued Operation, Accounts, Notes and Loans Receivable, Net		$ 48					48
Disposal Group, Including Discontinued Operation, Inventory, Current		99					99
Disposal Group, Including Discontinued Operation, Other Assets		369					369
Disposal Group, Including Discontinued Operation, Liabilities		44					44
Disposal Group, Including Discontinued Operation, Liabilities, Current		32					32
Sale Price		750					750
Estimated working capital adjustment		(16)					$ (16)
Transaction costs on disposition		(12)
Loss (Gain) on Sale of Businesses and Investments, Net		(250)
Proserv Group Business [Domain]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss (Gain) on Sale of Businesses and Investments, Net		$ (65)
Pipeline and Specialty Services Business [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sale Price			$ 246
Loss (Gain) on Sale of Businesses and Investments, Net			(49)
Cash disposed to sell disposal group			$ 245
Land Drilling and Workover Rig Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sale Price	$ 499
Cash disposed to sell disposal group	486
Long-Lived Asset Impairments, Write-Downs and Other Charges	143
Goodwill, Impairment Loss	121
Goodwill impairment (classified as assets held for sale)	$ 95
Borets [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss (Gain) on Sale of Businesses and Investments, Net				$ (18)
Equity method investment, ownership percentage								38.50%
Equity Method Investment, Amount Sold				400
Proceeds from sale of equity method investments				$ 359
Net sales proceeds, promissory note term				3 years
Amount of consideration received				$ 30