Acquisitions and Divestitures Acquisitions and Divestitures (Discontinued Operations Balance Sheet) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets of Disposal Group, Including Discontinued Operation, Current		$ 58
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment		526
Assets held for sale	0	584
Liabilities of Disposal Group, Including Discontinued Operation, Current		29
Disposal Group, Including Discontinued Operation, Other Liabilities		10
Liabilities held for sale	$ 0	$ 39

Amount classified as assets attributable to disposal group held for sale or disposed of.

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