Business Combinations and Divestitures (Divestitures - Assets Held for Sale) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Including Discontinued Operation, Operating Income (Loss)	$ 57	$ 58	$ 57
Disposal Group, Including Discontinued Operation, Classified Balance Sheet Disclosures [Abstract]
Total Current Assets Held for Sale	0	1,604
Total Current Liabilities Held for Sale	0	318
Engineered Chemistry and Integrity Dilling Fluids Business [Domain]
Disposal Group, Including Discontinued Operation, Classified Balance Sheet Disclosures [Abstract]
Accounts Receivables, net	48	48
Inventories, net	99	103
Property, Plant, and Equipment, Net	55	52
Goodwill	270	270
Other Intangible Assets, Net	43	49
Other Assets	1	5
Total Assets	516	527
Accounts Payable	32	37
Deferred Tax Liabilities	10	19
Accrued Expenses and Other Liabilities	2	23
Total Current Liabilities Held for Sale	44	79
Land Drilling and Workover Rig Operations [Member]
Disposal Group, Including Discontinued Operation, Classified Balance Sheet Disclosures [Abstract]
Accounts Receivables, net		244
Inventories, net		170
Other Current Assets		30
Property, Plant, and Equipment, Net		678
Goodwill		419
Other Intangible Assets, Net		59
Other Assets		4
Total Current Assets Held for Sale		1,604
Accounts Payable		173
Accrued Expenses and Other Liabilities		145
Total Current Liabilities Held for Sale		$ 318