Business Combinations and Divestitures (Divestitures - Assets Held for Sale) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			9 Months Ended			9 Months Ended				9 Months Ended
	Sep. 30, 2014	Jun. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Sep. 30, 2014 Land Drilling and Workover Rig Operations [Member]	Jul. 31, 2014 Land Drilling and Workover Rig Operations [Member]	Dec. 31, 2013 Assets Held-for-sale [Member]	Sep. 30, 2013 Assets Held-for-sale [Member]	Sep. 30, 2014 Pipeline and Specialty Services Business [Member]	Dec. 31, 2013 Liabilities Held for Sale [Member]	Sep. 30, 2013 Liabilities Held for Sale [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sale Price of Borets								$ 499			$ 246
Estimated working capital							10
Long-Lived Assets Impairment	0		0	143	0		143
Goodwill Impairment	(4)	121	0	121	0		121
Goodwill Impairment (classified as Assets Held For Sale)							95
Gain on Sale of Businesses	38		0	38	8		10				50
Disposal Group, Including Discontinued Operation, Classified Balance Sheet Disclosures [Abstract]
Accounts Receivables, net									196	0
Inventories, net									81	20
Other Current Assets									25	0
Property, Plant, and Equipment, Net									776	149
Goodwill									220	71
Other Intangible Assets, Net									10	0
Other Assets									3	0
Total Current Assets Held for Sale	240			240		1,311			1,311	240
Accounts Payable												135	0
Accrued Expenses and Other Liabilities												103	0
Total Current Liabilities Held for Sale	$ 0			$ 0		$ 238						$ 238	$ 0