Business Combinations and Divestitures (Divestitures Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		12 Months Ended			9 Months Ended	3 Months Ended
	Dec. 31, 2014	Jun. 30, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Sep. 30, 2014	Dec. 31, 2013	Jul. 31, 2014	Oct. 07, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on Sale of Businesses and Investments, Net	$ (311)		$ (349)	$ (24)	$ (28)
Long-Lived Assets Impairment			495	0	0
Goodwill, Impairment Loss	40	(125)	66		589
Total Current Liabilities Held for Sale	0		0	318			318
Engineered Chemistry and Integrity Dilling Fluids Business [Domain]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sale Price	750		750
Estimated working capital adjustment	(16)		(16)
Transaction costs on disposition			(12)
Gain on Sale of Businesses and Investments, Net			(250)
Accounts Receivables, net	48		48	48			48
Inventories, net	99		99	103			103
Other Assets	1		1	5			5
Total Current Liabilities Held for Sale	44		44	79			79
Proserv Group Business [Domain]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
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
Cash disposed to sell disposal group						245
Estimated working capital adjustment						2
Gain on Sale of Businesses and Investments, Net						(49)
Industrial Screen Business [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sale Price				137			137
Gain on Sale of Businesses and Investments, Net				(6)
Disposal Group,cash and cash equivalents				54			54
Accounts Receivables, net				36			36
Inventories, net				37			37
Other Assets				93			93
Liabilities				69			69
Total Current Liabilities Held for Sale				60			60
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
Estimated working capital adjustment								3
Gain on Sale of Businesses and Investments, Net		15
Long-Lived Assets Impairment		143
Goodwill, Impairment Loss		121
Goodwill impairment (classified as assets held for sale)		95
Accounts Receivables, net				244			244
Inventories, net				170			170
Other Assets				4			4
Total Current Liabilities Held for Sale				318			318
Borets [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Equity method investment, ownership percentage									38.50%
Net Sales Proceeds							400
Proceeds from sale of equity method investments							359
Net sales proceeds, promissory note term							3 years
Amount of consideration received							30
Value of consideration given							11
Equity Method Investment, Realized Gain (Loss) on Disposal							18
Subsea Controls Business [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on Sale of Businesses and Investments, Net					(28)
Amount of consideration received					173
Inventories, net					38
Liabilities					13
Gain (Loss) on disposition of business, net of tax					25
Accounts receivable and other current assets					39
Property, plant and equipment					5
Goodwill					$ 74